stringsql="select Id,StageName,`No`,(select Count(0) from rb_Student where CustomerId=@id and StuStage=a.Id) as ChildCount from rb_stage a where Group_Id=@gid order by `No`";
stringsql="select Id,StageName,`No`,(select Count(0) from rb_Student where CustomerId=@id and StuStage=a.Id) as ChildCount from rb_stage a where Group_Id=@gid order by `No`";