diff --git a/engine.go b/engine.go
index a035a63d..f865d6fc 100644
--- a/engine.go
+++ b/engine.go
@@ -771,6 +771,22 @@ func (engine *Engine) mapType(v reflect.Value) *core.Table {
 				if tags[0] == "-" {
 					continue
 				}
+
+				// by hzm
+				if strings.ToUpper(tags[0]) == "INHERITS" {
+					engine.LogInfo(tags[0])
+					if fieldValue.Kind() == reflect.Struct {
+						// 保留为了Find（）映射数据
+						parentTable := engine.mapType(fieldValue)
+						for _, col := range parentTable.Columns() {
+							col.FieldName = fmt.Sprintf("%v.%v", t.Field(i).Name, col.FieldName)
+							table.AddColumn(col)
+						}
+						table.AddInherit(engine.TableMapper.Obj2Table(fieldType.Name()))
+					}
+					continue
+				}
+
 				if strings.ToUpper(tags[0]) == "EXTENDS" {
 					if fieldValue.Kind() == reflect.Struct {
 						parentTable := engine.mapType(fieldValue)
diff --git a/helpers.go b/helpers.go
index 62cc4383..c1f4df72 100644
--- a/helpers.go
+++ b/helpers.go
@@ -187,7 +187,7 @@ func reflect2value(rawValue *reflect.Value) (str string, err error) {
 	//时间类型
 	case reflect.Struct:
 		if aa.ConvertibleTo(core.TimeType) {
-			str = vv.Convert(core.TimeType).Interface().(time.Time).Format(time.RFC3339Nano)
+			str = vv.Convert(core.TimeType).Interface().(time.Time).Format("2006-01-02 15:04:05")
 		} else {
 			err = fmt.Errorf("Unsupported struct type %v", vv.Type().Name())
 		}
diff --git a/statement.go b/statement.go
index a8d82f24..ddade508 100644
--- a/statement.go
+++ b/statement.go
@@ -852,7 +852,15 @@ func (statement *Statement) Cols(columns ...string) *Statement {
 	for _, nc := range newColumns {
 		statement.columnMap[strings.ToLower(nc)] = true
 	}
-	statement.ColumnStr = statement.Engine.Quote(strings.Join(newColumns, statement.Engine.Quote(", ")))
+
+	// by hzm
+	if len(newColumns) == 1 {
+		statement.ColumnStr = newColumns[0]
+
+	} else {
+		statement.ColumnStr = statement.Engine.Quote(strings.Join(newColumns, statement.Engine.Quote(", ")))
+	}
+
 	if strings.Contains(statement.ColumnStr, ".") {
 		statement.ColumnStr = strings.Replace(statement.ColumnStr, ".", statement.Engine.Quote("."), -1)
 	}