stringsql=$@"SELECT OrderGuestId, SUM(StudyNum) as MinutesNum FROM rb_class_check where `Status`=0 and Group_Id ={groupId} and CheckStatus =0 and OrderGuestId in ({guestIds}) group by OrderGuestId";
stringsql=$@"SELECT OrderGuestId, SUM(StudyNum) as MinutesNum FROM rb_class_check where `Status`=0 and Group_Id ={groupId} and CheckStatus =0 and OrderGuestId in ({guestIds}) group by OrderGuestId";