OCP-1Z0-051 第139题 子查询的注意事项

一、原题

Which three statements are true about multiple-row subqueries? (Choose three.)
A. They can contain a subquery within a subquery.
B. They can return multiple columns as well as rows.
C. They cannot contain a subquery within a subquery.
D. They can return only one column but multiple rows.
E. They can contain group functions and GROUP BY and HAVING clauses.

答案：ABE

二、题目翻译

关于多行子查询哪三句话是正确的？(选择三项)
A.子查询中能包含子查询。
B.能返回多列和多行。
C.子查询中不能包含子查询。
D.只能返回一列多行。
E.可以包含组函数和GROUP BY,HAVING子句。