diff --git a/codes.go b/codes.go
index 6f93fd6..8302e70 100644
--- a/codes.go
+++ b/codes.go
@@ -34,12 +34,6 @@ func NewCodesMysql(c *Client, dsn string) (*Codes, error) {
 		return nil, err
 	}
 	db.SetMapper(core.SameMapper{})
-	if err := db.Sync2(new(CodeModel)); err != nil {
-		return nil, err
-	}
-	if err := db.Sync2(new(UpdateModel)); err != nil {
-		return nil, err
-	}
 
 	return NewCodes(c, db)
 }
@@ -62,6 +56,12 @@ func NewCodesSqlite(c *Client, filenames ...string) (*Codes, error) {
 	}
 	db.SetMapper(core.SameMapper{})
 	db.DB().SetMaxOpenConns(1)
+
+	return NewCodes(c, db)
+}
+
+func NewCodes(c *Client, db *xorm.Engine) (*Codes, error) {
+
 	if err := db.Sync2(new(CodeModel)); err != nil {
 		return nil, err
 	}
@@ -69,11 +69,6 @@ func NewCodesSqlite(c *Client, filenames ...string) (*Codes, error) {
 		return nil, err
 	}
 
-	return NewCodes(c, db)
-}
-
-func NewCodes(c *Client, db *xorm.Engine) (*Codes, error) {
-
 	update := new(UpdateModel)
 	{ //查询或者插入一条数据
 		has, err := db.Get(update)
@@ -366,7 +361,7 @@ type UpdateModel struct {
 }
 
 func (*UpdateModel) TableName() string {
-	return "update"
+	return "codes_update"
 }
 
 type CodeModel struct {
diff --git a/workday.go b/workday.go
index 17fb0f0..0e43990 100644
--- a/workday.go
+++ b/workday.go
@@ -24,9 +24,6 @@ func NewWorkdayMysql(c *Client, dsn string) (*Workday, error) {
 		return nil, err
 	}
 	db.SetMapper(core.SameMapper{})
-	if err := db.Sync2(new(WorkdayModel)); err != nil {
-		return nil, err
-	}
 
 	return NewWorkday(c, db)
 }
@@ -47,14 +44,15 @@ func NewWorkdaySqlite(c *Client, filenames ...string) (*Workday, error) {
 	}
 	db.SetMapper(core.SameMapper{})
 	db.DB().SetMaxOpenConns(1)
-	if err := db.Sync2(new(WorkdayModel)); err != nil {
-		return nil, err
-	}
 
 	return NewWorkday(c, db)
 }
 
 func NewWorkday(c *Client, db *xorm.Engine) (*Workday, error) {
+	if err := db.Sync2(new(WorkdayModel)); err != nil {
+		return nil, err
+	}
+
 	w := &Workday{
 		Client: c,
 		db:     db,