日期:2014-05-18 浏览次数:20625 次
--级联删除 create table ta(id int not null primary key) insert ta select 1 create table tb(id int foreign key references ta(id) on delete cascade) insert tb select 1 select * from ta select * from tb delete ta select * from ta select * from tb drop table tb drop table ta
------解决方案--------------------
--->>>>TravyLee生成测试数据
if object_id('test')is not null
drop table test
go
create table test(
id int primary key,
value varchar(10)
)
go
insert test(id,value)
select 1,'test1' union all
select 2,'test2' union all
select 3,'test3' union all
select 4,'test4' union all
select 5,'test5'
go
if object_id('tbl')is not null
drop table tbl
go
create table tbl(
id int foreign key references test(id)
on delete cascade --指定级联删除
on update cascade, --指定级联更新
value varchar(5)
)
go
insert tbl
select 1,'true' union all
select 2,'false' union all
select 3,'false' union all
select 4,'true' union all
select 5,'false'
go
delete from test where value='test2'
select * from test
/*
test数据
-------------------------
id value
1 test1
3 test3
4 test4
5 test5
-------------------------
tbl数据
--------------------------
id value
1 true
3 false
4 true
5 false
*/
------解决方案--------------------