diff --git a/src/common/src/tname.c b/src/common/src/tname.c
index 960cc7d7251d95c37e7011e68bc47b0c6ae012e0..965a548d26429432ac45d3e05376e61e02f72cc3 100644
--- a/src/common/src/tname.c
+++ b/src/common/src/tname.c
@@ -105,7 +105,10 @@ int64_t taosGetIntervalStartTimestamp(int64_t startTime, int64_t slidingTime, in
     return startTime;
   }
 
-  int64_t start = ((startTime - intervalTime) / slidingTime + 1) * slidingTime;
+  int64_t delta = startTime - intervalTime;
+  int32_t factor = delta > 0? 1:-1;
+
+  int64_t start = (delta / slidingTime + factor) * slidingTime;
   if (!(timeUnit == 'u' || timeUnit == 'a' || timeUnit == 'm' || timeUnit == 's' || timeUnit == 'h')) {
     /*
      * here we revised the start time of day according to the local time zone,
diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index 7604a619afa859ccad4a670b25659f9a80b1cea4..6d74583a2cd82eceffa6df41685119b6343f4276 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -1909,6 +1909,15 @@ static void changeExecuteScanOrder(SQInfo *pQInfo, bool stableQuery) {
     return;
   }
 
+  if (isGroupbyNormalCol(pQuery->pGroupbyExpr)) {
+    pQuery->order.order = TSDB_ORDER_ASC;
+    if (pQuery->window.skey > pQuery->window.ekey) {
+      SWAP(pQuery->window.skey, pQuery->window.ekey, TSKEY);
+    }
+
+    return;
+  }
+
   if (isPointInterpoQuery(pQuery) && pQuery->intervalTime == 0) {
     if (!QUERY_IS_ASC_QUERY(pQuery)) {
       qDebug(msg, GET_QINFO_ADDR(pQuery), "interp", pQuery->order.order, TSDB_ORDER_ASC, pQuery->window.skey,
@@ -4387,7 +4396,7 @@ int32_t doInitQInfo(SQInfo *pQInfo, STSBuf *pTsBuf, void *tsdb, int32_t vgId, bo
 
   // NOTE: pTableCheckInfo need to update the query time range and the lastKey info
   // TODO fixme
-  changeExecuteScanOrder(pQInfo, false);
+  changeExecuteScanOrder(pQInfo, isSTableQuery);
 
   code = setupQueryHandle(tsdb, pQInfo, isSTableQuery);
   if (code != TSDB_CODE_SUCCESS) {
@@ -6095,6 +6104,9 @@ static SQInfo *createQInfoImpl(SQueryTableMsg *pQueryMsg, SArray* pTableIdList,
     goto _cleanup;
   }
 
+  // NOTE: pTableCheckInfo need to update the query time range and the lastKey info
+  changeExecuteScanOrder(pQInfo, isSTableQuery);
+
   int32_t index = 0;
 
   for(int32_t i = 0; i < numOfGroups; ++i) {