diff --git a/headless/chat/src/main/java/com/tencent/supersonic/headless/chat/parser/llm/OnePassSCSqlGenStrategy.java b/headless/chat/src/main/java/com/tencent/supersonic/headless/chat/parser/llm/OnePassSCSqlGenStrategy.java
index befec2502..7ce7c2331 100644
--- a/headless/chat/src/main/java/com/tencent/supersonic/headless/chat/parser/llm/OnePassSCSqlGenStrategy.java
+++ b/headless/chat/src/main/java/com/tencent/supersonic/headless/chat/parser/llm/OnePassSCSqlGenStrategy.java
@@ -36,6 +36,7 @@ public class OnePassSCSqlGenStrategy extends SqlGenStrategy {
             + "\n4.DO NOT calculate date range using functions."
             + "\n5.DO NOT miss the AGGREGATE operator of metrics, always add it as needed."
             + "\n6.ALWAYS use `with` statement if nested aggregation is needed."
+            + "\n7.ALWAYS add prefix `as_` to any alias created by the `AS` command."
             + "\n#Exemplars:\n{{exemplar}}"
             + "\n#Question:\nQuestion:{{question}},Schema:{{schema}},SideInfo:{{information}}";
 
diff --git a/launchers/standalone/src/test/java/com/tencent/supersonic/evaluation/Text2SQLEval.java b/launchers/standalone/src/test/java/com/tencent/supersonic/evaluation/Text2SQLEval.java
index f1e6869f2..c7b022a84 100644
--- a/launchers/standalone/src/test/java/com/tencent/supersonic/evaluation/Text2SQLEval.java
+++ b/launchers/standalone/src/test/java/com/tencent/supersonic/evaluation/Text2SQLEval.java
@@ -83,10 +83,10 @@ public class Text2SQLEval extends BaseTest {
     @Test
     public void test_filter_and_top() throws Exception {
         long start = System.currentTimeMillis();
-        QueryResult result = submitNewChat("近半个月来sales部门访问量最高的用户是谁", agentId);
+        QueryResult result = submitNewChat("近半个月来marketing部门访问量最高的用户是谁", agentId);
         durations.add(System.currentTimeMillis() - start);
         assert result.getQueryResults().size() == 1;
-        assert result.getTextResult().contains("tom");
+        assert result.getTextResult().contains("dean");
     }
 
     @Test