Question

我必须手动使用删除操作 delete from t where=col=1，因为如果我将其插入触发器内部则不起作用。即删除操作不会保存到deleted表中。

alter trigger trig1 on t
after insert,delete as
set col = case when col1=1.8 then 2

delete from t where col=1;

insert into history(col,col1)
select *
from deleted

表格历史记录无法插入。

Answer 1

执行此操作的最佳方法是将您要执行的三项操作分为三个部分，两个触发器和一个存储过程。

create trigger trig1 on t
after insert as
set col = case when col1=1.8 then 2

create procedure p(@t sysname) as
begin
if exists (select * from t where col=1)
delete from t where col=1;
end

create trigger trig2 on t
after delete as
insert into history(col,col1)
select *
from deleted

插入值时，您必须执行p。

如何在触发器内使用delete

1 个答案: