SQL SERVER的行式触发器

曾经以为SQL SERVER的触发器只能触发单行，也就是说如果一个delete触发器，如果同时删除多行时，只会对第一条记录触发，后来发现了不是人家SQL SERVER不支持，而是偶脑子笨没发现。

其实inserted和deleted两张内部表存放了所有要插入或要删除的记录，可以用cursor逐次访问里面的每条记录，下面是一个示例，该触发器将要删除的记录转移到另一张表中：

第一步，创建这两张表

create table table1([id] int primary key, [value] varchar(100))


create table table2([id] int primary key, [value] varchar(100))

第二步，插入测试数据

declare @i int


set @i = 1


while @i <= 100


begin


insert into table1([id], [value])


values(@i, cast(@i as varchar))




set @i = @i + 1


end

创建table1的delete触发器

create trigger tr_d_table1 on table1 for delete


as


begin


declare @id int, @value varchar(100)


declare cur_del cursor local forward_only for


select [id], [value]


from deleted




open cur_del


fetch next from cur_del into @id, @value


while @@fetch_status = 0


begin


insert into table2([id], [value])


values(@id, @value)




fetch next from cur_del into @id, @value


end




close cur_del


deallocate cur_del




end

现在对table1执行delete语句，发现所有被删除的记录都记录在在table2中了


delete from table1