diff --git a/mybatis-flex-core/src/main/java/com/mybatisflex/core/query/SelectQueryTable.java b/mybatis-flex-core/src/main/java/com/mybatisflex/core/query/SelectQueryTable.java
index 5ca6fa9a..b10306ac 100644
--- a/mybatis-flex-core/src/main/java/com/mybatisflex/core/query/SelectQueryTable.java
+++ b/mybatis-flex-core/src/main/java/com/mybatisflex/core/query/SelectQueryTable.java
@@ -1,17 +1,17 @@
-/**
- * Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
- * <p>
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- * <p>
- * http://www.apache.org/licenses/LICENSE-2.0
- * <p>
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
  */
 package com.mybatisflex.core.query;
 
@@ -51,7 +51,7 @@ public class SelectQueryTable extends QueryTable {
         if (StringUtil.isNotBlank(alias)) {
             return "(" + sql + ") AS " + dialect.wrap(alias);
         } else {
-            return sql;
+            return "(" + sql + ")";
         }
     }
 }