diff --git a/.gitignore b/.gitignore
index ad97fdd..0df6d18 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 .vscode
 mctl.exe
-mctl
\ No newline at end of file
+mctl
+.idea
\ No newline at end of file
diff --git a/gen/field.go b/gen/field.go
index 1b0f3ce..ad296a3 100644
--- a/gen/field.go
+++ b/gen/field.go
@@ -12,7 +12,45 @@ import (
 func genFields(fields []parser.Field) (string, error) {
 	var list []string
 	for _, field := range fields {
-		result, err := genField(field)
+
+		if strings.Contains(field.DataType, "NullTime") {
+
+			name := "start_" + field.Name.Source()
+			startField := parser.Field{
+				Name:         stringx.From(name),
+				DataBaseType: field.DataBaseType,
+				DataType:     field.DataType,
+				IsPrimaryKey: field.IsPrimaryKey,
+				IsUniqueKey:  field.IsUniqueKey,
+				Comment:      field.Comment,
+			}
+
+			result, err := genField(startField, false)
+			if err != nil {
+				return "", err
+			}
+
+			list = append(list, result)
+
+			endName := "end_" + field.Name.Source()
+			endField := parser.Field{
+				Name:         stringx.From(endName),
+				DataBaseType: field.DataBaseType,
+				DataType:     field.DataType,
+				IsPrimaryKey: field.IsPrimaryKey,
+				IsUniqueKey:  field.IsUniqueKey,
+				Comment:      field.Comment,
+			}
+
+			endResult, err := genField(endField, false)
+			if err != nil {
+				return "", err
+			}
+
+			list = append(list, endResult)
+		}
+
+		result, err := genField(field, true)
 		if err != nil {
 			return "", err
 		}
@@ -22,8 +60,8 @@ func genFields(fields []parser.Field) (string, error) {
 	return strings.Join(list, "\n"), nil
 }
 
-func genField(field parser.Field) (string, error) {
-	tag, err := genTag(field.Name.Source(), stringx.From(field.Name.ToCamel()).Untitle())
+func genField(field parser.Field, isDBField bool) (string, error) {
+	tag, err := genTag(field.Name.Source(), stringx.From(field.Name.ToCamel()).Untitle(), isDBField)
 	if err != nil {
 		return "", err
 	}
diff --git a/gen/findselective.go b/gen/findselective.go
index e9afefc..3edfeb6 100644
--- a/gen/findselective.go
+++ b/gen/findselective.go
@@ -59,10 +59,39 @@ func genFindSelective(table Table, withCache bool) (string, string, string, erro
 			continue
 		}
 
+		if strings.Contains(field.DataType, "NullTime") {
+			findIfFieldValueOutput, err := util.With("findSelectiveIfFieldValue").
+				Parse(text).
+				Execute(map[string]interface{}{
+					"field": field.Name.Source(),
+					"mark":  ">=",
+					"value": "Start" + field.Name.ToCamel(),
+				})
+			if err != nil {
+				return "", "", "", err
+			}
+
+			ifValues = append(ifValues, findIfFieldValueOutput.String())
+
+			findIfFieldValueOutput, err = util.With("findSelectiveIfFieldValue").
+				Parse(text).
+				Execute(map[string]interface{}{
+					"field": field.Name.Source(),
+					"mark":  "<![CDATA[<=]]>",
+					"value": "End" + field.Name.ToCamel(),
+				})
+			if err != nil {
+				return "", "", "", err
+			}
+
+			ifValues = append(ifValues, findIfFieldValueOutput.String())
+		}
+
 		findIfFieldValueOutput, err := util.With("findSelectiveIfFieldValue").
 			Parse(text).
 			Execute(map[string]interface{}{
 				"field": field.Name.Source(),
+				"mark":  "=",
 				"value": field.Name.ToCamel(),
 			})
 		if err != nil {
diff --git a/gen/tag.go b/gen/tag.go
index f11465d..c5a382d 100644
--- a/gen/tag.go
+++ b/gen/tag.go
@@ -5,7 +5,7 @@ import (
 	"github.com/wenj91/mctl/template"
 )
 
-func genTag(in string, jsonIn string) (string, error) {
+func genTag(in string, jsonIn string, isDBField bool) (string, error) {
 	if in == "" {
 		return in, nil
 	}
@@ -17,8 +17,9 @@ func genTag(in string, jsonIn string) (string, error) {
 	output, err := util.With("tag").
 		Parse(text).
 		Execute(map[string]interface{}{
-			"field": in,
-			"json":  jsonIn,
+			"field":     in,
+			"isDBField": isDBField,
+			"json":      jsonIn,
 		})
 	if err != nil {
 		return "", err
diff --git a/template/find.go b/template/find.go
index f114a41..0fedacf 100644
--- a/template/find.go
+++ b/template/find.go
@@ -51,8 +51,8 @@ func (r *{{.upperStartCamelObject}}FindResult) One() *{{.upperStartCamelObject}}
 }
 `
 
-var FindSelectiveIfFieldValue = `      <if test="{{.value}} != nil and {{.value}} != ''">
-        and {{.field}} = #{{print "{" .value print "}"}}
+var FindSelectiveIfFieldValue = `      <if test="{{.value}} != nil">
+        and {{.field}} {{.mark}} #{{print "{" .value print "}"}}
       </if>
 `
 
diff --git a/template/insert.go b/template/insert.go
index 70fca46..55949cd 100644
--- a/template/insert.go
+++ b/template/insert.go
@@ -14,12 +14,12 @@ func (m *default{{.upperStartCamelObject}}Model) InsertSelective(data *{{.upperS
 }
 `
 
-var InsertIfField = `      <if test="{{.value}} != nil and {{.value}} != ''">
+var InsertIfField = `      <if test="{{.value}} != nil">
         {{.field}},  
       </if>
 `
 
-var InsertIfValue = `      <if test="{{.value}} != nil and {{.value}} != ''">
+var InsertIfValue = `      <if test="{{.value}} != nil">
         #{{print "{" .value print "}"}},
       </if>
 `
diff --git a/template/tag.go b/template/tag.go
index 7c45eae..5bee7e4 100644
--- a/template/tag.go
+++ b/template/tag.go
@@ -1,3 +1,3 @@
 package template
 
-var Tag = "`field:\"{{.field}}\" json:\"{{.json}}\"`"
+var Tag = "`{{if .isDBField}}field:\"{{.field}}\" {{end}}json:\"{{.json}}\"`"
diff --git a/template/update.go b/template/update.go
index f4e954f..ee30b67 100644
--- a/template/update.go
+++ b/template/update.go
@@ -16,7 +16,7 @@ func (m *default{{.upperStartCamelObject}}Model) UpdateSelective(data *{{.upperS
 
 var UpdateFieldValue = `{{.field}} = #{{print "{" .value print "}"}}`
 
-var UpdateIfFieldValue = `      <if test="{{.value}} != nil and {{.value}} != ''">
+var UpdateIfFieldValue = `      <if test="{{.value}} != nil">
         {{.field}} = #{{print "{" .value print "}"}},
       </if>
 `