diff --git a/mybatis-flex-core/src/main/java/com/mybatisflex/core/querywrapper/FunctionQueryColumn.java b/mybatis-flex-core/src/main/java/com/mybatisflex/core/querywrapper/FunctionQueryColumn.java
index e5fd22b1..b211546f 100644
--- a/mybatis-flex-core/src/main/java/com/mybatisflex/core/querywrapper/FunctionQueryColumn.java
+++ b/mybatis-flex-core/src/main/java/com/mybatisflex/core/querywrapper/FunctionQueryColumn.java
@@ -59,4 +59,10 @@ public class FunctionQueryColumn extends QueryColumn {
         String sql = column.toSelectSql(queryTables, dialect);
         return StringUtil.isBlank(sql) ? "" : fnName + "(" + sql + ")" + WrapperUtil.buildAsAlias(alias);
     }
+
+    @Override
+    public QueryColumn as(String alias) {
+        this.alias = alias;
+        return this;
+    }
 }