如何循环读取deleted表的内容
a表有delete触发器
a表的删除方式可能是delete from a where id in (1,2,3...)同时删除多条
现在想实现的是delete时
select @pid = pid from delete 得到a表删除时的pid字段的值
然后更新另一个表
update b set cnt = cnt + 1 where pid = @pid
-------
但是如果用in的方法同时删除多条 这样好像就不对了只处理第一条
怎么循环从delete读取pid循环update b表 呢
[解决办法]
先把准备delete的pid读出来update表B，update好了以后在delete不就得了嘛。
两个做成事务一次提交。
[解决办法]
update b set cnt = cnt + 1 from 另一个表 b, deleted c where b.pid = cpid
[解决办法]
触发器这样写
create trigger tr_a on a
for delete
as
begin
update b
set b.cnt = b.cnt+1
from b
join deleted a on a.pid = b.pid
end
go
[解决办法]
-- 笔误
update b set cnt = cnt + 1 from 另一个表 b, deleted c where b.pid = c.pid
