sql server 实现行级触发器方法

sql server本身没有行级触发器，可用游标实现

create trigger delticket on ticket after delete  as begin  	declare @Tno char(20) 	declare cur cursor local forward_only for 	select [Tno] 	from deleted 	open cur 	fetch next from cur into @Tno 	while @@FETCH_STATUS=0 		begin update train 			set train.seatnum=train.seatnum-1 			from train 			where train.Tno=@Tno 			fetch next from cur into @Tno 		end	 	close cur 	deallocate cur end

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