摘要:1.使用外键:#添加外键,有constraint 约束名。alter table test3add constraint fk_test3_test1_id foreign key (test1_id) references test1(id) on delete set null on updat...
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posted @ 2015-10-23 17:52
posted @ 2015-10-23 17:52
posted @ 2015-10-23 17:48