diff --git a/Src/Asp.NetCore2/SqlSugar.XuguCore/Xugu/DbMaintenance/XuguDbMaintenance.cs b/Src/Asp.NetCore2/SqlSugar.XuguCore/Xugu/DbMaintenance/XuguDbMaintenance.cs
index ee1921e2b..3412e7f45 100644
--- a/Src/Asp.NetCore2/SqlSugar.XuguCore/Xugu/DbMaintenance/XuguDbMaintenance.cs
+++ b/Src/Asp.NetCore2/SqlSugar.XuguCore/Xugu/DbMaintenance/XuguDbMaintenance.cs
@@ -34,7 +34,7 @@ namespace SqlSugar.Xugu
 	CASE WHEN I.IS_PRIMARY THEN TRUE ELSE FALSE END `ISPRIMARYKEY`
 FROM USER_COLUMNS C
 LEFT JOIN USER_TABLES T ON T.TABLE_ID=C.TABLE_ID
-LEFT JOIN USER_INDEXES I ON T.TABLE_ID=I.TABLE_ID AND I.KEYS LIKE concat('%',C.COL_NAME,'%')
+LEFT JOIN USER_INDEXES I ON T.TABLE_ID=I.TABLE_ID AND I.KEYS LIKE  '%'|| C.COL_NAME || '%' 
 WHERE T.TABLE_NAME='{0}' AND T.DB_ID=CURRENT_DB_ID
 	AND T.USER_ID=CURRENT_USERID AND T.SCHEMA_ID=CURRENT_SCHEMAID
 ORDER BY C.COL_NO";//FIND_IN_SET('""'+C.COL_NAME+'""',I.KEYS)>0