diff --git a/model.go b/model.go
index 3f550c8..6aee33f 100644
--- a/model.go
+++ b/model.go
@@ -42,7 +42,7 @@ func (m *Model) Delete() *Query {
 // Select
 func (m *Model) Select(f ...string) *Query {
 	if len(f) == 0 {
-		f = m.Table.AllFields
+		f = m.Table.SelectFields
 	}
 
 	q := NewQuery(Servers[m.Module])
diff --git a/table.go b/table.go
index 60dbcce..98a77e3 100644
--- a/table.go
+++ b/table.go
@@ -19,25 +19,64 @@ type Table struct {
 	// All fields, except primary
 	Fields []string
 
-	// All fields
-	AllFields []string
+	// Fields for select, include primary
+	SelectFields []string
+
+	// Fields for add
+	AddFields []string
+
+	// Fields for update
+	UpdateFields []string
 
 	// json and field property map
 	FiledsMap map[string]string
 
-	// Entity
+	// Entity type
 	EntityType reflect.Type
 }
 
 // New Table
 func NewTable(tableName string, entity interface{}) *Table {
-	p, f, af, jf := tableFields(entity)
+	primary := ""
+	fields := make([]string, 0)
+	selectFields := make([]string, 0)
+	addFields := make([]string, 0)
+	updateFields := make([]string, 0)
+	filedsMap := make(map[string]string)
+	typ := reflect.Indirect(reflect.ValueOf(entity)).Type()
+
+	for i := 0; i < typ.NumField(); i++ {
+		field := typ.Field(i)
+
+		fd := field.Name
+		if field.Tag.Get("field") != "" {
+			fd = field.Tag.Get("field")
+		}
+
+		jn := field.Name
+		if field.Tag.Get("json") != "" {
+			jn = field.Tag.Get("json")
+		}
+
+		//!field.Anonymous
+		if field.Tag.Get("pk") == "true" {
+			primary = fd
+		} else {
+			fields = append(fields, fd)
+		}
+
+		selectFields = append(selectFields, fd)
+		filedsMap[jn] = fd
+	}
+
 	return &Table{
-		Name:       tableName,
-		Primary:    p,
-		Fields:     f,
-		AllFields:  af,
-		FiledsMap:  jf,
-		EntityType: reflect.ValueOf(entity).Elem().Type(),
+		Name:         tableName,
+		Primary:      primary,
+		Fields:       fields,
+		SelectFields: selectFields,
+		AddFields:    addFields,
+		UpdateFields: updateFields,
+		FiledsMap:    filedsMap,
+		EntityType:   typ,
 	}
 }
diff --git a/util.go b/util.go
index 3ce51b7..4f00db4 100644
--- a/util.go
+++ b/util.go
@@ -10,6 +10,29 @@ import (
 	"reflect"
 )
 
+// Type assertions
+func typeAssertion(v interface{}) interface{} {
+	switch v.(type) {
+	case []byte:
+		return v.([]byte)
+	case []rune:
+		return v.([]rune)
+	case bool:
+		return v.(bool)
+	case float64:
+		return v.(float64)
+	case int64:
+		return v.(int64)
+	case nil:
+		return nil
+	case string:
+		return v.(string)
+	default:
+		log.Printf("Unexpected type %#v\n", v)
+		return ""
+	}
+}
+
 // Get scan variables
 func scanVariables(ptr interface{}, columnsLen int, isRows bool) (reflect.Kind, interface{}, []interface{}, error) {
 	typ := reflect.TypeOf(ptr)
@@ -59,73 +82,3 @@ func scanVariables(ptr interface{}, columnsLen int, isRows bool) (reflect.Kind,
 
 	return 0, nil, nil, errors.New("ptr is not a point struct, map or slice")
 }
-
-// Type assertions
-func typeAssertion(v interface{}) interface{} {
-	switch v.(type) {
-	case []byte:
-		return v.([]byte)
-	case []rune:
-		return v.([]rune)
-	case bool:
-		return v.(bool)
-	case float64:
-		return v.(float64)
-	case int64:
-		return v.(int64)
-	case nil:
-		return nil
-	case string:
-		return v.(string)
-	default:
-		log.Printf("Unexpected type %#v\n", v)
-		return ""
-	}
-}
-
-// Table alias
-func tableAlias(alias []string) string {
-	if len(alias) > 0 {
-		return alias[0]
-	}
-	return ""
-}
-
-// Reflect struct, construct Field slice
-func tableFields(entity interface{}) (string, []string, []string, map[string]string) {
-	typ := reflect.Indirect(reflect.ValueOf(entity)).Type()
-	primary := ""
-	fields := make([]string, 0)
-	allFields := make([]string, 0)
-	jsonMap := make(map[string]string)
-
-	for i := 0; i < typ.NumField(); i++ {
-		field := typ.Field(i)
-
-		var fd string
-		if field.Tag.Get("field") != "" {
-			fd = field.Tag.Get("field")
-		} else {
-			fd = field.Name
-		}
-
-		var jn string
-		if field.Tag.Get("json") != "" {
-			jn = field.Tag.Get("json")
-		} else {
-			jn = field.Name
-		}
-
-		//!field.Anonymous
-		if field.Tag.Get("pk") == "true" {
-			primary = fd
-		} else {
-			fields = append(fields, fd)
-		}
-
-		allFields = append(allFields, fd)
-		jsonMap[jn] = fd
-	}
-
-	return primary, fields, allFields, jsonMap
-}