日期:2014-05-18 浏览次数:20510 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
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--->>>>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 */
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