diff --git a/pkg/query-service/druidQuery/mysql-query.go b/pkg/query-service/druidQuery/mysql-query.go
index 584b43c579..32de6c5ee5 100644
--- a/pkg/query-service/druidQuery/mysql-query.go
+++ b/pkg/query-service/druidQuery/mysql-query.go
@@ -240,7 +240,7 @@ func GetUsage(client *SqlClient, query *model.GetUsageParams) (*[]UsageItem, err
 func GetServiceExternalAvgDuration(client *SqlClient, query *model.GetServiceOverviewParams) (*[]ServiceExternalItem, error) {
 
 	sqlQuery := fmt.Sprintf(`SELECT TIME_FLOOR(__time,  '%s') as "time", AVG(DurationNano) as "avgDuration" FROM %s WHERE ServiceName='%s' AND Kind='3' AND ExternalHttpUrl != '' AND "__time" >= '%s' AND "__time" <= '%s'
-	GROUP BY TIME_FLOOR(__time,  '%s'), ExternalHttpUrl`, query.Period, constants.DruidDatasource, query.ServiceName, query.StartTime, query.EndTime, query.Period)
+	GROUP BY TIME_FLOOR(__time,  '%s')`, query.Period, constants.DruidDatasource, query.ServiceName, query.StartTime, query.EndTime, query.Period)
 
 	// zap.S().Debug(sqlQuery)