题目内容

连接谓词______或______的含义是指根据指定子查询的结果是存在还是不存在,进一步决定是否执行查询操作。

查看答案
更多问题

下列( )关键字是可以实现表与表的内连接。A.inner joinB.left joinC.right joinD.cross join

A. .inner join
B. left join
C. right join
D. cross join

下列( )关键字是可以实现表与表的左连接。A.inner joinB.left joinC.right joinD.full join

A. inner join
B. left join
C. right join
D. full join

下列( )关键字是可以实现表与表的右连接。A.inner joinB.left joinC.right joinD.cross join

A. inner join
B. left join
C. right join
D. cross join

下列( )关键字是可以实现表与表的全连接。A.full joinB.left joinC.right joinD.cross join

A. full join
B. left join
C. right join
D. cross join

答案查题题库