diff --git a/kernel/api/av.go b/kernel/api/av.go
index 80ba40b50..a3c8e3761 100644
--- a/kernel/api/av.go
+++ b/kernel/api/av.go
@@ -35,13 +35,27 @@ func renderAttributeView(c *gin.Context) {
 	}
 
 	id := arg["id"].(string)
-	av, err := model.RenderAttributeView(id)
+	view, attrView, err := model.RenderAttributeView(id)
 	if nil != err {
 		ret.Code = -1
 		ret.Msg = err.Error()
 		return
 	}
+
+	var views []map[string]interface{}
+	for _, v := range attrView.Views {
+		view := map[string]interface{}{
+			"id":   v.ID,
+			"name": v.Name,
+		}
+
+		views = append(views, view)
+	}
+
 	ret.Data = map[string]interface{}{
-		"av": av,
+		"name":     attrView.Name,
+		"views":    views,
+		"viewType": view.Type(),
+		"view":     view,
 	}
 }
diff --git a/kernel/av/av.go b/kernel/av/attribute_view.go
similarity index 74%
rename from kernel/av/av.go
rename to kernel/av/attribute_view.go
index fbf581e07..28e73d238 100644
--- a/kernel/av/av.go
+++ b/kernel/av/attribute_view.go
@@ -33,43 +33,60 @@ import (
 
 // AttributeView 描述了属性视图的结构。
 type AttributeView struct {
-	Spec    int       `json:"spec"`
+	Spec    int       `json:"spec"`    // 格式版本
 	ID      string    `json:"id"`      // 属性视图 ID
 	Name    string    `json:"name"`    // 属性视图名称
-	Columns []*Column `json:"columns"` // 表格列名
-	Rows    []*Row    `json:"rows"`    // 表格行记录
+	Columns []*Column `json:"columns"` // 列
+	Rows    []*Row    `json:"rows"`    // 行
 
-	Type    AttributeViewType      `json:"type"`    // 属性视图类型
-	Filters []*AttributeViewFilter `json:"filters"` // 过滤规则
-	Sorts   []*AttributeViewSort   `json:"sorts"`   // 排序规则
+	CurrentViewID string  `json:"currentViewId"` // 当前视图 ID
+	Views         []*View `json:"views"`         // 视图
 }
 
-// AttributeViewType 描述了属性视图的类型。
-type AttributeViewType string
+// View 描述了视图的结构。
+type View struct {
+	ID   string   `json:"id"`   // 视图 ID
+	Name string   `json:"name"` // 视图名称
+	Type ViewType `json:"type"` // 视图类型
+
+	Filters []*ViewFilter `json:"filters"` // 过滤规则
+	Sorts   []*ViewSort   `json:"sorts"`   // 排序规则
+}
+
+// ViewType 描述了视图的类型。
+type ViewType string
 
 const (
-	AttributeViewTypeTable AttributeViewType = "table" // 属性视图类型 - 表格
+	ViewTypeTable  ViewType = "table"  // 属性视图类型 - 表格
+	ViewTypeKanban ViewType = "kanban" // 属性视图类型 - 看板
 )
 
-func NewAttributeView(id string) *AttributeView {
-	return &AttributeView{
-		Spec:    0,
-		ID:      id,
-		Name:    "Table",
-		Columns: []*Column{{ID: ast.NewNodeID(), Name: "Block", Type: ColumnTypeBlock}},
-		Rows:    []*Row{},
-		Type:    AttributeViewTypeTable,
-		Filters: []*AttributeViewFilter{},
-		Sorts:   []*AttributeViewSort{},
-	}
+// Viewable 描述了视图的接口。
+type Viewable interface {
+	Filterable
+	Sortable
+	Calculable
+
+	Type() ViewType
 }
 
-func (av *AttributeView) GetColumnNames() (ret []string) {
-	ret = []string{}
-	for _, column := range av.Columns {
-		ret = append(ret, column.Name)
+func NewAttributeView(id string) *AttributeView {
+	view := &View{
+		ID:      ast.NewNodeID(),
+		Name:    "Table",
+		Type:    ViewTypeTable,
+		Filters: []*ViewFilter{},
+		Sorts:   []*ViewSort{},
+	}
+
+	return &AttributeView{
+		Spec:          0,
+		ID:            id,
+		Columns:       []*Column{{ID: ast.NewNodeID(), Name: "Block", Type: ColumnTypeBlock}},
+		Rows:          []*Row{},
+		CurrentViewID: view.ID,
+		Views:         []*View{view},
 	}
-	return
 }
 
 func ParseAttributeView(avID string) (ret *AttributeView, err error) {
@@ -90,6 +107,19 @@ func ParseAttributeView(avID string) (ret *AttributeView, err error) {
 		logging.LogErrorf("unmarshal attribute view [%s] failed: %s", avID, err)
 		return
 	}
+
+	if 1 > len(ret.Views) {
+		view := &View{
+			ID:      ast.NewNodeID(),
+			Name:    "Table",
+			Type:    ViewTypeTable,
+			Filters: []*ViewFilter{},
+			Sorts:   []*ViewSort{},
+		}
+
+		ret.CurrentViewID = view.ID
+		ret.Views = []*View{view}
+	}
 	return
 }
 
diff --git a/kernel/av/column.go b/kernel/av/column.go
index 46bf529dd..5ed989f2e 100644
--- a/kernel/av/column.go
+++ b/kernel/av/column.go
@@ -18,8 +18,6 @@ package av
 
 import (
 	"github.com/88250/lute/ast"
-	"math"
-	"sort"
 )
 
 type ColumnType string
@@ -65,471 +63,3 @@ func NewColumn(name string, columnType ColumnType) *Column {
 		Type: columnType,
 	}
 }
-
-type ColumnCalc struct {
-	Column   string       `json:"column"`
-	Operator CalcOperator `json:"operator"`
-	Result   *Value       `json:"result"`
-}
-
-type CalcOperator string
-
-const (
-	CalcOperatorNone              CalcOperator = ""
-	CalcOperatorCountAll          CalcOperator = "Count all"
-	CalcOperatorCountValues       CalcOperator = "Count values"
-	CalcOperatorCountUniqueValues CalcOperator = "Count unique values"
-	CalcOperatorCountEmpty        CalcOperator = "Count empty"
-	CalcOperatorCountNotEmpty     CalcOperator = "Count not empty"
-	CalcOperatorPercentEmpty      CalcOperator = "Percent empty"
-	CalcOperatorPercentNotEmpty   CalcOperator = "Percent not empty"
-	CalcOperatorSum               CalcOperator = "Sum"
-	CalcOperatorAverage           CalcOperator = "Average"
-	CalcOperatorMedian            CalcOperator = "Median"
-	CalcOperatorMin               CalcOperator = "Min"
-	CalcOperatorMax               CalcOperator = "Max"
-	CalcOperatorRange             CalcOperator = "Range"
-	CalcOperatorEarliest          CalcOperator = "Earliest"
-	CalcOperatorLatest            CalcOperator = "Latest"
-)
-
-func (av *AttributeView) CalcCols() {
-	for i, col := range av.Columns {
-		if nil == col.Calc {
-			continue
-		}
-
-		if CalcOperatorNone == col.Calc.Operator {
-			continue
-		}
-
-		switch col.Type {
-		case ColumnTypeText:
-			av.calcColText(col, i)
-		case ColumnTypeNumber:
-			av.calcColNumber(col, i)
-		case ColumnTypeDate:
-			av.calcColDate(col, i)
-		case ColumnTypeSelect:
-			av.calcColSelect(col, i)
-		case ColumnTypeMSelect:
-			av.calcColMSelect(col, i)
-		}
-	}
-}
-
-func (av *AttributeView) calcColMSelect(col *Column, colIndex int) {
-	switch col.Calc.Operator {
-	case CalcOperatorCountAll:
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(len(av.Rows))}}
-	case CalcOperatorCountValues:
-		countValues := 0
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.MSelect && 0 < len(row.Cells[colIndex].Value.MSelect) {
-				countValues += len(row.Cells[colIndex].Value.MSelect)
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countValues)}}
-	case CalcOperatorCountUniqueValues:
-		countUniqueValues := 0
-		uniqueValues := map[string]bool{}
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.MSelect && 0 < len(row.Cells[colIndex].Value.MSelect) {
-				for _, sel := range row.Cells[colIndex].Value.MSelect {
-					if _, ok := uniqueValues[sel.Content]; !ok {
-						uniqueValues[sel.Content] = true
-						countUniqueValues++
-					}
-				}
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countUniqueValues)}}
-	case CalcOperatorCountEmpty:
-		countEmpty := 0
-		for _, row := range av.Rows {
-			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.MSelect || 0 == len(row.Cells[colIndex].Value.MSelect) {
-				countEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty)}}
-	case CalcOperatorCountNotEmpty:
-		countNotEmpty := 0
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.MSelect && 0 < len(row.Cells[colIndex].Value.MSelect) {
-				countNotEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty)}}
-	case CalcOperatorPercentEmpty:
-		countEmpty := 0
-		for _, row := range av.Rows {
-			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.MSelect || 0 == len(row.Cells[colIndex].Value.MSelect) {
-				countEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty) / float64(len(av.Rows))}}
-	case CalcOperatorPercentNotEmpty:
-		countNotEmpty := 0
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.MSelect && 0 < len(row.Cells[colIndex].Value.MSelect) {
-				countNotEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty) / float64(len(av.Rows))}}
-	}
-}
-
-func (av *AttributeView) calcColSelect(col *Column, colIndex int) {
-	switch col.Calc.Operator {
-	case CalcOperatorCountAll:
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(len(av.Rows))}}
-	case CalcOperatorCountValues:
-		countValues := 0
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.MSelect && 0 < len(row.Cells[colIndex].Value.MSelect) && nil != row.Cells[colIndex].Value.MSelect[0] && "" != row.Cells[colIndex].Value.MSelect[0].Content {
-				countValues++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countValues)}}
-	case CalcOperatorCountUniqueValues:
-		countUniqueValues := 0
-		uniqueValues := map[string]bool{}
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.MSelect && 0 < len(row.Cells[colIndex].Value.MSelect) && nil != row.Cells[colIndex].Value.MSelect[0] && "" != row.Cells[colIndex].Value.MSelect[0].Content {
-				uniqueValues[row.Cells[colIndex].Value.MSelect[0].Content] = true
-				countUniqueValues++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countUniqueValues)}}
-	case CalcOperatorCountEmpty:
-		countEmpty := 0
-		for _, row := range av.Rows {
-			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.MSelect || 1 > len(row.Cells[colIndex].Value.MSelect) || nil == row.Cells[colIndex].Value.MSelect[0] || "" == row.Cells[colIndex].Value.MSelect[0].Content {
-				countEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty)}}
-	case CalcOperatorCountNotEmpty:
-		countNotEmpty := 0
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.MSelect && 0 < len(row.Cells[colIndex].Value.MSelect) && nil != row.Cells[colIndex].Value.MSelect[0] && "" != row.Cells[colIndex].Value.MSelect[0].Content {
-				countNotEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty)}}
-	case CalcOperatorPercentEmpty:
-		countEmpty := 0
-		for _, row := range av.Rows {
-			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.MSelect || 1 > len(row.Cells[colIndex].Value.MSelect) || nil == row.Cells[colIndex].Value.MSelect[0] || "" == row.Cells[colIndex].Value.MSelect[0].Content {
-				countEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty) / float64(len(av.Rows))}}
-	case CalcOperatorPercentNotEmpty:
-		countNotEmpty := 0
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.MSelect && 0 < len(row.Cells[colIndex].Value.MSelect) && nil != row.Cells[colIndex].Value.MSelect[0] && "" != row.Cells[colIndex].Value.MSelect[0].Content {
-				countNotEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty) / float64(len(av.Rows))}}
-	}
-}
-
-func (av *AttributeView) calcColDate(col *Column, colIndex int) {
-	switch col.Calc.Operator {
-	case CalcOperatorCountAll:
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(len(av.Rows))}}
-	case CalcOperatorCountValues:
-		countValues := 0
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Date && 0 != row.Cells[colIndex].Value.Date.Content {
-				countValues++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countValues)}}
-	case CalcOperatorCountUniqueValues:
-		countUniqueValues := 0
-		uniqueValues := map[int64]bool{}
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Date && 0 != row.Cells[colIndex].Value.Date.Content {
-				if _, ok := uniqueValues[row.Cells[colIndex].Value.Date.Content]; !ok {
-					countUniqueValues++
-					uniqueValues[row.Cells[colIndex].Value.Date.Content] = true
-				}
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countUniqueValues)}}
-	case CalcOperatorCountEmpty:
-		countEmpty := 0
-		for _, row := range av.Rows {
-			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.Date || 0 == row.Cells[colIndex].Value.Date.Content {
-				countEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty)}}
-	case CalcOperatorCountNotEmpty:
-		countNotEmpty := 0
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Date && 0 != row.Cells[colIndex].Value.Date.Content {
-				countNotEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty)}}
-	case CalcOperatorPercentEmpty:
-		countEmpty := 0
-		for _, row := range av.Rows {
-			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.Date || 0 == row.Cells[colIndex].Value.Date.Content {
-				countEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty) / float64(len(av.Rows))}}
-	case CalcOperatorPercentNotEmpty:
-		countNotEmpty := 0
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Date && 0 != row.Cells[colIndex].Value.Date.Content {
-				countNotEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty) / float64(len(av.Rows))}}
-	case CalcOperatorEarliest:
-		earliest := int64(0)
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Date && 0 != row.Cells[colIndex].Value.Date.Content {
-				if 0 == earliest || earliest > row.Cells[colIndex].Value.Date.Content {
-					earliest = row.Cells[colIndex].Value.Date.Content
-				}
-			}
-		}
-		if 0 != earliest {
-			col.Calc.Result = &Value{Date: &ValueDate{Content: earliest}}
-		}
-	case CalcOperatorLatest:
-		latest := int64(0)
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Date && 0 != row.Cells[colIndex].Value.Date.Content {
-				if 0 == latest || latest < row.Cells[colIndex].Value.Date.Content {
-					latest = row.Cells[colIndex].Value.Date.Content
-				}
-			}
-		}
-		if 0 != latest {
-			col.Calc.Result = &Value{Date: &ValueDate{Content: latest}}
-		}
-	case CalcOperatorRange:
-		earliest := int64(0)
-		latest := int64(0)
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Date && 0 != row.Cells[colIndex].Value.Date.Content {
-				if 0 == earliest || earliest > row.Cells[colIndex].Value.Date.Content {
-					earliest = row.Cells[colIndex].Value.Date.Content
-				}
-				if 0 == latest || latest < row.Cells[colIndex].Value.Date.Content {
-					latest = row.Cells[colIndex].Value.Date.Content
-				}
-			}
-		}
-		if 0 != earliest && 0 != latest {
-			col.Calc.Result = &Value{Date: &ValueDate{Content: latest - earliest}}
-		}
-	}
-}
-
-func (av *AttributeView) calcColNumber(col *Column, colIndex int) {
-	switch col.Calc.Operator {
-	case CalcOperatorCountAll:
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(len(av.Rows))}}
-	case CalcOperatorCountValues:
-		countValues := 0
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number {
-				countValues++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countValues)}}
-	case CalcOperatorCountUniqueValues:
-		countUniqueValues := 0
-		uniqueValues := map[float64]bool{}
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number && row.Cells[colIndex].Value.Number.IsNotEmpty {
-				if !uniqueValues[row.Cells[colIndex].Value.Number.Content] {
-					uniqueValues[row.Cells[colIndex].Value.Number.Content] = true
-					countUniqueValues++
-				}
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countUniqueValues)}}
-	case CalcOperatorCountEmpty:
-		countEmpty := 0
-		for _, row := range av.Rows {
-			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.Number && !row.Cells[colIndex].Value.Number.IsNotEmpty {
-				countEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty)}}
-	case CalcOperatorCountNotEmpty:
-		countNotEmpty := 0
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number && row.Cells[colIndex].Value.Number.IsNotEmpty {
-				countNotEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty)}}
-	case CalcOperatorPercentEmpty:
-		countEmpty := 0
-		for _, row := range av.Rows {
-			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.Number && !row.Cells[colIndex].Value.Number.IsNotEmpty {
-				countEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty) / float64(len(av.Rows))}}
-	case CalcOperatorPercentNotEmpty:
-		countNotEmpty := 0
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number && row.Cells[colIndex].Value.Number.IsNotEmpty {
-				countNotEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty) / float64(len(av.Rows))}}
-	case CalcOperatorSum:
-		sum := 0.0
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number && row.Cells[colIndex].Value.Number.IsNotEmpty {
-				sum += row.Cells[colIndex].Value.Number.Content
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: sum}}
-	case CalcOperatorAverage:
-		sum := 0.0
-		count := 0
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number && row.Cells[colIndex].Value.Number.IsNotEmpty {
-				sum += row.Cells[colIndex].Value.Number.Content
-				count++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: sum / float64(count)}}
-	case CalcOperatorMedian:
-		values := []float64{}
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number && row.Cells[colIndex].Value.Number.IsNotEmpty {
-				values = append(values, row.Cells[colIndex].Value.Number.Content)
-			}
-		}
-		sort.Float64s(values)
-		if len(values) > 0 {
-			if len(values)%2 == 0 {
-				col.Calc.Result = &Value{Number: &ValueNumber{Content: (values[len(values)/2-1] + values[len(values)/2]) / 2}}
-			} else {
-				col.Calc.Result = &Value{Number: &ValueNumber{Content: values[len(values)/2]}}
-			}
-		} else {
-			col.Calc.Result = &Value{Number: &ValueNumber{IsNotEmpty: false}}
-		}
-	case CalcOperatorMin:
-		min := math.MaxFloat64
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number && row.Cells[colIndex].Value.Number.IsNotEmpty {
-				if row.Cells[colIndex].Value.Number.Content < min {
-					min = row.Cells[colIndex].Value.Number.Content
-				}
-			}
-		}
-		if math.MaxFloat64 != min {
-			col.Calc.Result = &Value{Number: &ValueNumber{Content: min}}
-		} else {
-			col.Calc.Result = &Value{Number: &ValueNumber{IsNotEmpty: false}}
-		}
-	case CalcOperatorMax:
-		max := -math.MaxFloat64
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number && row.Cells[colIndex].Value.Number.IsNotEmpty {
-				if row.Cells[colIndex].Value.Number.Content > max {
-					max = row.Cells[colIndex].Value.Number.Content
-				}
-			}
-		}
-		if -math.MaxFloat64 != max {
-			col.Calc.Result = &Value{Number: &ValueNumber{Content: max}}
-		} else {
-			col.Calc.Result = &Value{Number: &ValueNumber{IsNotEmpty: false}}
-		}
-	case CalcOperatorRange:
-		min := math.MaxFloat64
-		max := -math.MaxFloat64
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number && row.Cells[colIndex].Value.Number.IsNotEmpty {
-				if row.Cells[colIndex].Value.Number.Content < min {
-					min = row.Cells[colIndex].Value.Number.Content
-				}
-				if row.Cells[colIndex].Value.Number.Content > max {
-					max = row.Cells[colIndex].Value.Number.Content
-				}
-			}
-		}
-		if math.MaxFloat64 != min && -math.MaxFloat64 != max {
-			col.Calc.Result = &Value{Number: &ValueNumber{Content: max - min}}
-		} else {
-			col.Calc.Result = &Value{Number: &ValueNumber{IsNotEmpty: false}}
-		}
-	}
-}
-
-func (av *AttributeView) calcColText(col *Column, colIndex int) {
-	switch col.Calc.Operator {
-	case CalcOperatorCountAll:
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(len(av.Rows))}}
-	case CalcOperatorCountValues:
-		countValues := 0
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Text && "" != row.Cells[colIndex].Value.Text.Content {
-				countValues++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countValues)}}
-	case CalcOperatorCountUniqueValues:
-		countUniqueValues := 0
-		uniqueValues := map[string]bool{}
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Text && "" != row.Cells[colIndex].Value.Text.Content {
-				if !uniqueValues[row.Cells[colIndex].Value.Text.Content] {
-					uniqueValues[row.Cells[colIndex].Value.Text.Content] = true
-					countUniqueValues++
-				}
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countUniqueValues)}}
-	case CalcOperatorCountEmpty:
-		countEmpty := 0
-		for _, row := range av.Rows {
-			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.Text || "" == row.Cells[colIndex].Value.Text.Content {
-				countEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty)}}
-	case CalcOperatorCountNotEmpty:
-		countNotEmpty := 0
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Text && "" != row.Cells[colIndex].Value.Text.Content {
-				countNotEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty)}}
-	case CalcOperatorPercentEmpty:
-		countEmpty := 0
-		for _, row := range av.Rows {
-			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.Text || "" == row.Cells[colIndex].Value.Text.Content {
-				countEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty) / float64(len(av.Rows))}}
-	case CalcOperatorPercentNotEmpty:
-		countNotEmpty := 0
-		for _, row := range av.Rows {
-			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Text && "" != row.Cells[colIndex].Value.Text.Content {
-				countNotEmpty++
-			}
-		}
-		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty) / float64(len(av.Rows))}}
-	}
-}
diff --git a/kernel/av/column_calc.go b/kernel/av/column_calc.go
new file mode 100644
index 000000000..e2df83e57
--- /dev/null
+++ b/kernel/av/column_calc.go
@@ -0,0 +1,48 @@
+// SiYuan - Refactor your thinking
+// Copyright (c) 2020-present, b3log.org
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package av
+
+type Calculable interface {
+	CalcCols()
+}
+
+type ColumnCalc struct {
+	Column   string       `json:"column"`
+	Operator CalcOperator `json:"operator"`
+	Result   *Value       `json:"result"`
+}
+
+type CalcOperator string
+
+const (
+	CalcOperatorNone              CalcOperator = ""
+	CalcOperatorCountAll          CalcOperator = "Count all"
+	CalcOperatorCountValues       CalcOperator = "Count values"
+	CalcOperatorCountUniqueValues CalcOperator = "Count unique values"
+	CalcOperatorCountEmpty        CalcOperator = "Count empty"
+	CalcOperatorCountNotEmpty     CalcOperator = "Count not empty"
+	CalcOperatorPercentEmpty      CalcOperator = "Percent empty"
+	CalcOperatorPercentNotEmpty   CalcOperator = "Percent not empty"
+	CalcOperatorSum               CalcOperator = "Sum"
+	CalcOperatorAverage           CalcOperator = "Average"
+	CalcOperatorMedian            CalcOperator = "Median"
+	CalcOperatorMin               CalcOperator = "Min"
+	CalcOperatorMax               CalcOperator = "Max"
+	CalcOperatorRange             CalcOperator = "Range"
+	CalcOperatorEarliest          CalcOperator = "Earliest"
+	CalcOperatorLatest            CalcOperator = "Latest"
+)
diff --git a/kernel/av/filter.go b/kernel/av/filter.go
index 89525bc17..9760ccf26 100644
--- a/kernel/av/filter.go
+++ b/kernel/av/filter.go
@@ -16,7 +16,11 @@
 
 package av
 
-type AttributeViewFilter struct {
+type Filterable interface {
+	FilterRows()
+}
+
+type ViewFilter struct {
 	Column   string         `json:"column"`
 	Operator FilterOperator `json:"operator"`
 	Value    *Value         `json:"value"`
@@ -40,39 +44,3 @@ const (
 	FilterOperatorIsBetween         FilterOperator = "Is between"
 	FilterOperatorIsRelativeToToday FilterOperator = "Is relative to today"
 )
-
-func (av *AttributeView) FilterRows() {
-	if 1 > len(av.Filters) {
-		return
-	}
-
-	var colIndexes []int
-	for _, f := range av.Filters {
-		for i, c := range av.Columns {
-			if c.ID == f.Column {
-				colIndexes = append(colIndexes, i)
-				break
-			}
-		}
-	}
-
-	rows := []*Row{}
-	for _, row := range av.Rows {
-		pass := true
-		for j, index := range colIndexes {
-			c := av.Columns[index]
-			if c.Type == ColumnTypeBlock {
-				continue
-			}
-
-			if !row.Cells[index].Value.CompareOperator(av.Filters[j].Value, av.Filters[j].Operator) {
-				pass = false
-				break
-			}
-		}
-		if pass {
-			rows = append(rows, row)
-		}
-	}
-	av.Rows = rows
-}
diff --git a/kernel/av/sort.go b/kernel/av/sort.go
index fe0061a89..d95877a05 100644
--- a/kernel/av/sort.go
+++ b/kernel/av/sort.go
@@ -16,9 +16,11 @@
 
 package av
 
-import "sort"
+type Sortable interface {
+	SortRows()
+}
 
-type AttributeViewSort struct {
+type ViewSort struct {
 	Column string    `json:"column"` // 列 ID
 	Order  SortOrder `json:"order"`  // 排序顺序
 }
@@ -29,44 +31,3 @@ const (
 	SortOrderAsc  SortOrder = "ASC"
 	SortOrderDesc SortOrder = "DESC"
 )
-
-func (av *AttributeView) SortRows() {
-	if 1 > len(av.Sorts) {
-		return
-	}
-
-	type ColIndexSort struct {
-		Index int
-		Order SortOrder
-	}
-
-	var colIndexSorts []*ColIndexSort
-	for _, s := range av.Sorts {
-		for i, c := range av.Columns {
-			if c.ID == s.Column {
-				colIndexSorts = append(colIndexSorts, &ColIndexSort{Index: i, Order: s.Order})
-				break
-			}
-		}
-	}
-
-	sort.Slice(av.Rows, func(i, j int) bool {
-		for _, colIndexSort := range colIndexSorts {
-			c := av.Columns[colIndexSort.Index]
-			if c.Type == ColumnTypeBlock {
-				continue
-			}
-
-			result := av.Rows[i].Cells[colIndexSort.Index].Value.Compare(av.Rows[j].Cells[colIndexSort.Index].Value)
-			if 0 == result {
-				continue
-			}
-
-			if colIndexSort.Order == SortOrderAsc {
-				return 0 > result
-			}
-			return 0 < result
-		}
-		return false
-	})
-}
diff --git a/kernel/av/table.go b/kernel/av/table.go
new file mode 100644
index 000000000..bb104fe13
--- /dev/null
+++ b/kernel/av/table.go
@@ -0,0 +1,556 @@
+// SiYuan - Refactor your thinking
+// Copyright (c) 2020-present, b3log.org
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package av
+
+import (
+	"math"
+	"sort"
+)
+
+// Table 描述了表格视图的结构。
+type Table struct {
+	Spec int `json:"spec"` // 视图格式版本
+
+	ID      string        `json:"id"`      // 表格 ID
+	Name    string        `json:"name"`    // 表格名称
+	Columns []*Column     `json:"columns"` // 表格列
+	Rows    []*Row        `json:"rows"`    // 表格行
+	Filters []*ViewFilter `json:"filters"` // 过滤规则
+	Sorts   []*ViewSort   `json:"sorts"`   // 排序规则
+}
+
+func (table *Table) Type() ViewType {
+	return ViewTypeTable
+}
+
+func (table *Table) SortRows() {
+	if 1 > len(table.Sorts) {
+		return
+	}
+
+	type ColIndexSort struct {
+		Index int
+		Order SortOrder
+	}
+
+	var colIndexSorts []*ColIndexSort
+	for _, s := range table.Sorts {
+		for i, c := range table.Columns {
+			if c.ID == s.Column {
+				colIndexSorts = append(colIndexSorts, &ColIndexSort{Index: i, Order: s.Order})
+				break
+			}
+		}
+	}
+
+	sort.Slice(table.Rows, func(i, j int) bool {
+		for _, colIndexSort := range colIndexSorts {
+			c := table.Columns[colIndexSort.Index]
+			if c.Type == ColumnTypeBlock {
+				continue
+			}
+
+			result := table.Rows[i].Cells[colIndexSort.Index].Value.Compare(table.Rows[j].Cells[colIndexSort.Index].Value)
+			if 0 == result {
+				continue
+			}
+
+			if colIndexSort.Order == SortOrderAsc {
+				return 0 > result
+			}
+			return 0 < result
+		}
+		return false
+	})
+}
+
+func (table *Table) FilterRows() {
+	if 1 > len(table.Filters) {
+		return
+	}
+
+	var colIndexes []int
+	for _, f := range table.Filters {
+		for i, c := range table.Columns {
+			if c.ID == f.Column {
+				colIndexes = append(colIndexes, i)
+				break
+			}
+		}
+	}
+
+	rows := []*Row{}
+	for _, row := range table.Rows {
+		pass := true
+		for j, index := range colIndexes {
+			c := table.Columns[index]
+			if c.Type == ColumnTypeBlock {
+				continue
+			}
+
+			if !row.Cells[index].Value.CompareOperator(table.Filters[j].Value, table.Filters[j].Operator) {
+				pass = false
+				break
+			}
+		}
+		if pass {
+			rows = append(rows, row)
+		}
+	}
+	table.Rows = rows
+}
+
+func (table *Table) CalcCols() {
+	for i, col := range table.Columns {
+		if nil == col.Calc {
+			continue
+		}
+
+		if CalcOperatorNone == col.Calc.Operator {
+			continue
+		}
+
+		switch col.Type {
+		case ColumnTypeText:
+			table.calcColText(col, i)
+		case ColumnTypeNumber:
+			table.calcColNumber(col, i)
+		case ColumnTypeDate:
+			table.calcColDate(col, i)
+		case ColumnTypeSelect:
+			table.calcColSelect(col, i)
+		case ColumnTypeMSelect:
+			table.calcColMSelect(col, i)
+		}
+	}
+}
+
+func (table *Table) calcColMSelect(col *Column, colIndex int) {
+	switch col.Calc.Operator {
+	case CalcOperatorCountAll:
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(len(table.Rows))}}
+	case CalcOperatorCountValues:
+		countValues := 0
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.MSelect && 0 < len(row.Cells[colIndex].Value.MSelect) {
+				countValues += len(row.Cells[colIndex].Value.MSelect)
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countValues)}}
+	case CalcOperatorCountUniqueValues:
+		countUniqueValues := 0
+		uniqueValues := map[string]bool{}
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.MSelect && 0 < len(row.Cells[colIndex].Value.MSelect) {
+				for _, sel := range row.Cells[colIndex].Value.MSelect {
+					if _, ok := uniqueValues[sel.Content]; !ok {
+						uniqueValues[sel.Content] = true
+						countUniqueValues++
+					}
+				}
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countUniqueValues)}}
+	case CalcOperatorCountEmpty:
+		countEmpty := 0
+		for _, row := range table.Rows {
+			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.MSelect || 0 == len(row.Cells[colIndex].Value.MSelect) {
+				countEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty)}}
+	case CalcOperatorCountNotEmpty:
+		countNotEmpty := 0
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.MSelect && 0 < len(row.Cells[colIndex].Value.MSelect) {
+				countNotEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty)}}
+	case CalcOperatorPercentEmpty:
+		countEmpty := 0
+		for _, row := range table.Rows {
+			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.MSelect || 0 == len(row.Cells[colIndex].Value.MSelect) {
+				countEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty) / float64(len(table.Rows))}}
+	case CalcOperatorPercentNotEmpty:
+		countNotEmpty := 0
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.MSelect && 0 < len(row.Cells[colIndex].Value.MSelect) {
+				countNotEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty) / float64(len(table.Rows))}}
+	}
+}
+
+func (table *Table) calcColSelect(col *Column, colIndex int) {
+	switch col.Calc.Operator {
+	case CalcOperatorCountAll:
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(len(table.Rows))}}
+	case CalcOperatorCountValues:
+		countValues := 0
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.MSelect && 0 < len(row.Cells[colIndex].Value.MSelect) && nil != row.Cells[colIndex].Value.MSelect[0] && "" != row.Cells[colIndex].Value.MSelect[0].Content {
+				countValues++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countValues)}}
+	case CalcOperatorCountUniqueValues:
+		countUniqueValues := 0
+		uniqueValues := map[string]bool{}
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.MSelect && 0 < len(row.Cells[colIndex].Value.MSelect) && nil != row.Cells[colIndex].Value.MSelect[0] && "" != row.Cells[colIndex].Value.MSelect[0].Content {
+				uniqueValues[row.Cells[colIndex].Value.MSelect[0].Content] = true
+				countUniqueValues++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countUniqueValues)}}
+	case CalcOperatorCountEmpty:
+		countEmpty := 0
+		for _, row := range table.Rows {
+			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.MSelect || 1 > len(row.Cells[colIndex].Value.MSelect) || nil == row.Cells[colIndex].Value.MSelect[0] || "" == row.Cells[colIndex].Value.MSelect[0].Content {
+				countEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty)}}
+	case CalcOperatorCountNotEmpty:
+		countNotEmpty := 0
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.MSelect && 0 < len(row.Cells[colIndex].Value.MSelect) && nil != row.Cells[colIndex].Value.MSelect[0] && "" != row.Cells[colIndex].Value.MSelect[0].Content {
+				countNotEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty)}}
+	case CalcOperatorPercentEmpty:
+		countEmpty := 0
+		for _, row := range table.Rows {
+			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.MSelect || 1 > len(row.Cells[colIndex].Value.MSelect) || nil == row.Cells[colIndex].Value.MSelect[0] || "" == row.Cells[colIndex].Value.MSelect[0].Content {
+				countEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty) / float64(len(table.Rows))}}
+	case CalcOperatorPercentNotEmpty:
+		countNotEmpty := 0
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.MSelect && 0 < len(row.Cells[colIndex].Value.MSelect) && nil != row.Cells[colIndex].Value.MSelect[0] && "" != row.Cells[colIndex].Value.MSelect[0].Content {
+				countNotEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty) / float64(len(table.Rows))}}
+	}
+}
+
+func (table *Table) calcColDate(col *Column, colIndex int) {
+	switch col.Calc.Operator {
+	case CalcOperatorCountAll:
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(len(table.Rows))}}
+	case CalcOperatorCountValues:
+		countValues := 0
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Date && 0 != row.Cells[colIndex].Value.Date.Content {
+				countValues++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countValues)}}
+	case CalcOperatorCountUniqueValues:
+		countUniqueValues := 0
+		uniqueValues := map[int64]bool{}
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Date && 0 != row.Cells[colIndex].Value.Date.Content {
+				if _, ok := uniqueValues[row.Cells[colIndex].Value.Date.Content]; !ok {
+					countUniqueValues++
+					uniqueValues[row.Cells[colIndex].Value.Date.Content] = true
+				}
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countUniqueValues)}}
+	case CalcOperatorCountEmpty:
+		countEmpty := 0
+		for _, row := range table.Rows {
+			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.Date || 0 == row.Cells[colIndex].Value.Date.Content {
+				countEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty)}}
+	case CalcOperatorCountNotEmpty:
+		countNotEmpty := 0
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Date && 0 != row.Cells[colIndex].Value.Date.Content {
+				countNotEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty)}}
+	case CalcOperatorPercentEmpty:
+		countEmpty := 0
+		for _, row := range table.Rows {
+			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.Date || 0 == row.Cells[colIndex].Value.Date.Content {
+				countEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty) / float64(len(table.Rows))}}
+	case CalcOperatorPercentNotEmpty:
+		countNotEmpty := 0
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Date && 0 != row.Cells[colIndex].Value.Date.Content {
+				countNotEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty) / float64(len(table.Rows))}}
+	case CalcOperatorEarliest:
+		earliest := int64(0)
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Date && 0 != row.Cells[colIndex].Value.Date.Content {
+				if 0 == earliest || earliest > row.Cells[colIndex].Value.Date.Content {
+					earliest = row.Cells[colIndex].Value.Date.Content
+				}
+			}
+		}
+		if 0 != earliest {
+			col.Calc.Result = &Value{Date: &ValueDate{Content: earliest}}
+		}
+	case CalcOperatorLatest:
+		latest := int64(0)
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Date && 0 != row.Cells[colIndex].Value.Date.Content {
+				if 0 == latest || latest < row.Cells[colIndex].Value.Date.Content {
+					latest = row.Cells[colIndex].Value.Date.Content
+				}
+			}
+		}
+		if 0 != latest {
+			col.Calc.Result = &Value{Date: &ValueDate{Content: latest}}
+		}
+	case CalcOperatorRange:
+		earliest := int64(0)
+		latest := int64(0)
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Date && 0 != row.Cells[colIndex].Value.Date.Content {
+				if 0 == earliest || earliest > row.Cells[colIndex].Value.Date.Content {
+					earliest = row.Cells[colIndex].Value.Date.Content
+				}
+				if 0 == latest || latest < row.Cells[colIndex].Value.Date.Content {
+					latest = row.Cells[colIndex].Value.Date.Content
+				}
+			}
+		}
+		if 0 != earliest && 0 != latest {
+			col.Calc.Result = &Value{Date: &ValueDate{Content: latest - earliest}}
+		}
+	}
+}
+
+func (table *Table) calcColNumber(col *Column, colIndex int) {
+	switch col.Calc.Operator {
+	case CalcOperatorCountAll:
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(len(table.Rows))}}
+	case CalcOperatorCountValues:
+		countValues := 0
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number {
+				countValues++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countValues)}}
+	case CalcOperatorCountUniqueValues:
+		countUniqueValues := 0
+		uniqueValues := map[float64]bool{}
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number && row.Cells[colIndex].Value.Number.IsNotEmpty {
+				if !uniqueValues[row.Cells[colIndex].Value.Number.Content] {
+					uniqueValues[row.Cells[colIndex].Value.Number.Content] = true
+					countUniqueValues++
+				}
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countUniqueValues)}}
+	case CalcOperatorCountEmpty:
+		countEmpty := 0
+		for _, row := range table.Rows {
+			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.Number && !row.Cells[colIndex].Value.Number.IsNotEmpty {
+				countEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty)}}
+	case CalcOperatorCountNotEmpty:
+		countNotEmpty := 0
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number && row.Cells[colIndex].Value.Number.IsNotEmpty {
+				countNotEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty)}}
+	case CalcOperatorPercentEmpty:
+		countEmpty := 0
+		for _, row := range table.Rows {
+			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.Number && !row.Cells[colIndex].Value.Number.IsNotEmpty {
+				countEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty) / float64(len(table.Rows))}}
+	case CalcOperatorPercentNotEmpty:
+		countNotEmpty := 0
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number && row.Cells[colIndex].Value.Number.IsNotEmpty {
+				countNotEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty) / float64(len(table.Rows))}}
+	case CalcOperatorSum:
+		sum := 0.0
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number && row.Cells[colIndex].Value.Number.IsNotEmpty {
+				sum += row.Cells[colIndex].Value.Number.Content
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: sum}}
+	case CalcOperatorAverage:
+		sum := 0.0
+		count := 0
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number && row.Cells[colIndex].Value.Number.IsNotEmpty {
+				sum += row.Cells[colIndex].Value.Number.Content
+				count++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: sum / float64(count)}}
+	case CalcOperatorMedian:
+		values := []float64{}
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number && row.Cells[colIndex].Value.Number.IsNotEmpty {
+				values = append(values, row.Cells[colIndex].Value.Number.Content)
+			}
+		}
+		sort.Float64s(values)
+		if len(values) > 0 {
+			if len(values)%2 == 0 {
+				col.Calc.Result = &Value{Number: &ValueNumber{Content: (values[len(values)/2-1] + values[len(values)/2]) / 2}}
+			} else {
+				col.Calc.Result = &Value{Number: &ValueNumber{Content: values[len(values)/2]}}
+			}
+		} else {
+			col.Calc.Result = &Value{Number: &ValueNumber{IsNotEmpty: false}}
+		}
+	case CalcOperatorMin:
+		min := math.MaxFloat64
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number && row.Cells[colIndex].Value.Number.IsNotEmpty {
+				if row.Cells[colIndex].Value.Number.Content < min {
+					min = row.Cells[colIndex].Value.Number.Content
+				}
+			}
+		}
+		if math.MaxFloat64 != min {
+			col.Calc.Result = &Value{Number: &ValueNumber{Content: min}}
+		} else {
+			col.Calc.Result = &Value{Number: &ValueNumber{IsNotEmpty: false}}
+		}
+	case CalcOperatorMax:
+		max := -math.MaxFloat64
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number && row.Cells[colIndex].Value.Number.IsNotEmpty {
+				if row.Cells[colIndex].Value.Number.Content > max {
+					max = row.Cells[colIndex].Value.Number.Content
+				}
+			}
+		}
+		if -math.MaxFloat64 != max {
+			col.Calc.Result = &Value{Number: &ValueNumber{Content: max}}
+		} else {
+			col.Calc.Result = &Value{Number: &ValueNumber{IsNotEmpty: false}}
+		}
+	case CalcOperatorRange:
+		min := math.MaxFloat64
+		max := -math.MaxFloat64
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Number && row.Cells[colIndex].Value.Number.IsNotEmpty {
+				if row.Cells[colIndex].Value.Number.Content < min {
+					min = row.Cells[colIndex].Value.Number.Content
+				}
+				if row.Cells[colIndex].Value.Number.Content > max {
+					max = row.Cells[colIndex].Value.Number.Content
+				}
+			}
+		}
+		if math.MaxFloat64 != min && -math.MaxFloat64 != max {
+			col.Calc.Result = &Value{Number: &ValueNumber{Content: max - min}}
+		} else {
+			col.Calc.Result = &Value{Number: &ValueNumber{IsNotEmpty: false}}
+		}
+	}
+}
+
+func (table *Table) calcColText(col *Column, colIndex int) {
+	switch col.Calc.Operator {
+	case CalcOperatorCountAll:
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(len(table.Rows))}}
+	case CalcOperatorCountValues:
+		countValues := 0
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Text && "" != row.Cells[colIndex].Value.Text.Content {
+				countValues++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countValues)}}
+	case CalcOperatorCountUniqueValues:
+		countUniqueValues := 0
+		uniqueValues := map[string]bool{}
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Text && "" != row.Cells[colIndex].Value.Text.Content {
+				if !uniqueValues[row.Cells[colIndex].Value.Text.Content] {
+					uniqueValues[row.Cells[colIndex].Value.Text.Content] = true
+					countUniqueValues++
+				}
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countUniqueValues)}}
+	case CalcOperatorCountEmpty:
+		countEmpty := 0
+		for _, row := range table.Rows {
+			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.Text || "" == row.Cells[colIndex].Value.Text.Content {
+				countEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty)}}
+	case CalcOperatorCountNotEmpty:
+		countNotEmpty := 0
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Text && "" != row.Cells[colIndex].Value.Text.Content {
+				countNotEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty)}}
+	case CalcOperatorPercentEmpty:
+		countEmpty := 0
+		for _, row := range table.Rows {
+			if nil == row.Cells[colIndex] || nil == row.Cells[colIndex].Value || nil == row.Cells[colIndex].Value.Text || "" == row.Cells[colIndex].Value.Text.Content {
+				countEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countEmpty) / float64(len(table.Rows))}}
+	case CalcOperatorPercentNotEmpty:
+		countNotEmpty := 0
+		for _, row := range table.Rows {
+			if nil != row.Cells[colIndex] && nil != row.Cells[colIndex].Value && nil != row.Cells[colIndex].Value.Text && "" != row.Cells[colIndex].Value.Text.Content {
+				countNotEmpty++
+			}
+		}
+		col.Calc.Result = &Value{Number: &ValueNumber{Content: float64(countNotEmpty) / float64(len(table.Rows))}}
+	}
+}
diff --git a/kernel/model/attribute_view.go b/kernel/model/attribute_view.go
index eb1569707..2d9e6ec36 100644
--- a/kernel/model/attribute_view.go
+++ b/kernel/model/attribute_view.go
@@ -32,18 +32,53 @@ import (
 	"github.com/siyuan-note/siyuan/kernel/util"
 )
 
-func RenderAttributeView(avID string) (ret *av.AttributeView, err error) {
+func RenderAttributeView(avID string) (viewable av.Viewable, attrView *av.AttributeView, err error) {
 	waitForSyncingStorages()
 
-	ret, err = av.ParseAttributeView(avID)
+	attrView, err = av.ParseAttributeView(avID)
 	if nil != err {
 		logging.LogErrorf("parse attribute view [%s] failed: %s", avID, err)
 		return
 	}
 
-	ret.FilterRows()
-	ret.SortRows()
-	ret.CalcCols()
+	if 1 > len(attrView.Views) {
+		err = errors.New("no view")
+		return
+	}
+
+	var view *av.View
+	if "" != attrView.CurrentViewID {
+		for _, v := range attrView.Views {
+			if v.ID == attrView.CurrentViewID {
+				view = v
+				break
+			}
+		}
+	} else {
+		view = attrView.Views[0]
+	}
+
+	switch view.Type {
+	case av.ViewTypeTable:
+		viewable, err = renderAttributeViewTable(attrView, view)
+	}
+
+	viewable.FilterRows()
+	viewable.SortRows()
+	viewable.CalcCols()
+	return
+}
+
+func renderAttributeViewTable(attrView *av.AttributeView, view *av.View) (ret *av.Table, err error) {
+	ret = &av.Table{
+		Spec:    attrView.Spec,
+		ID:      view.ID,
+		Name:    view.Name,
+		Columns: attrView.Columns,
+		Rows:    attrView.Rows,
+		Filters: view.Filters,
+		Sorts:   view.Sorts,
+	}
 	return
 }