diff --git a/tests/army/community/query/query_basic.py b/tests/army/community/query/query_basic.py
index 740d14e11b..211d3e6ec3 100644
--- a/tests/army/community/query/query_basic.py
+++ b/tests/army/community/query/query_basic.py
@@ -177,10 +177,10 @@ class TDTestCase(TBase):
             sql = f"select ts from d0 where ui={expectMax}"
             tdSql.query(sql)
             tss = tdSql.getColData(0)
-            strts = ",".join(map(str,tss))
-            # delete
-            sql = f"delete from d0 where ts in ({strts})"
-            tdSql.execute(sql)
+            for ts in tss:            
+                # delete
+                sql = f"delete from d0 where ts = '{ts}'"
+                tdSql.execute(sql)
             expectMax -= 1
 
         self.checkInsertCorrect()    
diff --git a/tests/army/frame/caseBase.py b/tests/army/frame/caseBase.py
index 5715867faf..de258e6267 100644
--- a/tests/army/frame/caseBase.py
+++ b/tests/army/frame/caseBase.py
@@ -292,3 +292,15 @@ class TBase:
         if len(lists) == 0:
             tdLog.exit(f"list is empty {tips}")
 
+
+#
+#  str util
+#
+    # covert list to sql format string
+    def listSql(self, lists, sepa = ","):
+        strs = ""
+        for ls in lists:
+            if strs != "":
+                strs += sepa
+            strs += f"'{ls}'"
+        return strs
\ No newline at end of file