移动端

  • 题王微信公众号

    题王微信公众号

    微信搜“题王网”真题密题、最新资讯、考试攻略、轻松拿下考试

单选题

When defining a referential constraint between the parent table T2 and the dependent table T1, which of the following is true?()

发布日期:2020-04-10

When defining a referential constraint between the...
A

The list of column names in the FOREIGN KEY clause can be a subset of the list of column names in the primary key of T2 or a UNIQUE constraint that exists on T2.

B

The list of column names in the FOREIGN KEY clause can be a subset of the list of column names in the primary key of T1 or a UNIQUE constraint that exists on T1.

C

The list of column names in the FOREIGN KEY clause must be identical to the list of column names in the primary key of T2 or a UNIQUE constraint that exists on T2.

D

The list of column names in the FOREIGN KEY clause must be identical to the list of column names in the primary key of T1 or a UNIQUE constraint that exists on T1.

题王网让考试变得更简单

扫码关注题王,更多免费功能准备上线!

此试题出现在

CMS专题

CMS专题

去刷题
热门试题热门资讯 相关试题

暂无相关推荐~