摘要: 创建一个外键命令create table test1 (name char(20) primary key,age int);create table test2(name char(20) primary key,age int,secondname char(20),foreign key(secondname) references test1(name)); 阅读全文
posted @ 2013-08-08 13:58 popping 阅读(98) 评论(0) 推荐(0) 编辑