update d set d.fdetailcount=v.fcount
from t_ItemDetail d,
(select fdetailid,count(*) fcount from t_ItemDetailv where fitemid=-1 group by fdetailid ) v
where d.fdetailid=v.fdetailid
go
update d set d.fdetailcount=v.fcount
from t_ItemDetail d,
(select fdetailid,count(*) fcount from t_ItemDetailv where fitemid=-1 group by fdetailid ) v
where d.fdetailid=v.fdetailid