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
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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
下列( )关键字是可以实现表与表的交叉连接。A.inner joinB.left joinC.right joinD.cross join
A. inner join
B. left join
C. right join
D. cross join
下列( )连接谓词的含义是指,确定指定列的值或表达式的值是否与子查询或列表中的值相匹配/不匹配。A.allB.anyC.inD.exists
A. all
B. any
C. in
D. exists