diff --git a/mysql.go b/mysql.go
index 0dbc3d1d..666bb0aa 100644
--- a/mysql.go
+++ b/mysql.go
@@ -38,7 +38,7 @@ func (d *mysql) SqlTag(value reflect.Value, size int) string {
 		}
 	case reflect.Struct:
 		if value.Type() == timeType {
-			return "datetime"
+			return "timestamp"
 		}
 	default:
 		if _, ok := value.Interface().([]byte); ok {
diff --git a/scope_private.go b/scope_private.go
index a48f443b..2d5f3ff4 100644
--- a/scope_private.go
+++ b/scope_private.go
@@ -24,7 +24,7 @@ func (scope *Scope) buildWhereCondition(clause map[string]interface{}) (str stri
 			id, _ := strconv.Atoi(value)
 			return scope.primaryCondiation(scope.AddToVars(id))
 		} else {
-			str = value
+			str = fmt.Sprintf("(%v)", value)
 		}
 	case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64:
 		return scope.primaryCondiation(scope.AddToVars(value))