标签：foreign cto constrain class 字段名 SQ ble table for
8.添加外键
mysql>alter table tb_product add constraint fk_1 foreign key(factoryid) references tb_factory(factoryid); mysql>alter table <表名> add constraint <外键名> foreign key<字段名> REFERENCES <外表表名><字段名>;
9.删除外键
mysql>alter table tb_people drop foreign key fk_1; mysql>alter table <表名> drop foreign key <外键名>;
标签：foreign cto constrain class 字段名 SQ ble table for
原文地址：https://www.cnblogs.com/pansidong/p/9158730.html
