填空题
MySQL数据程序设计
2018-08-30
在如下的建表语句中,设置外键sno参照于xs(sno)，外键kno参照于kc(kno)，并都在更新、删除数据时设置cascade策略
Create table xs_kc
( id int not null auto_increment primary key,
sno char(6) not null,
Kno char(3) not null,
Chengji tinyint(1) null,
( )
参考答案
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答案解析
Create table xs_kc
( id int not null auto_increment primary key,
sno char(6) not null,
Kno char(3) not null,
Chengji tinyint(1) null,
Foreign key(sno) references xs(sno) on delete cascade on update cascade,
Foreign key(kno) references kc(kno) on delete cascade on update cascade);
( id int not null auto_increment primary key,
sno char(6) not null,
Kno char(3) not null,
Chengji tinyint(1) null,
Foreign key(sno) references xs(sno) on delete cascade on update cascade,
Foreign key(kno) references kc(kno) on delete cascade on update cascade);