Mysql---5(DML) 外键constraint不推荐 表中数据的insert into values update set where delete from where truncate
摘要:
1.constraint FK_keyname foreign key (key name) reference table2(`key`) 数据库级别的外键不建议使用 2.DML 插入表数据: insert into tablename(key1,key2,..)values(value1,val 阅读全文