【第34题】OCP认证1Z0-071最新考试题库及答案

071考试不仅是OCP11g的考试科目，同时也是OCP 12c的考试科目，所以关心071考题的同学有很多，对此我们专门收集整理了近期071考试的原题，并对这些考题进行讲解，希望帮助广大考生顺利通过071考试。

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071考题解析-第34题、choose two

Which two statements are true regarding operators used with subqueries? (Choose two.)

A) =ANY and =ALL operators have the same functionality.

E) The NOT IN operator is equivalent to is NULL.

C) The

D) The NOT operator can be used with IN, ANY and ALL operators.

E) The IN operator cannot be used in single-row subqueries.

Answer：CD

(解析：051 曾经出现过，但是当时是单选题，答案是 D，这个语法比较少见。

其实就是把 NOT 放到整个表达式之前，下面条件执行的结果都是一样，考大家的逻辑思维能力：

WHERE NOT col IN (SELECT ...)(也可以是 WHERE col not IN (SELECT ...))

WHERE NOT col = ANY (SELECT ...)(大于、小于都可以)

WHERE NOT col = ALL (SELECT ...)(大于、小于都可以)

SQL> select deptno from emp

2 where not deptno in (select deptno from dept where deptno=10);

DEPTNO

----------

20

30

30

....

或者：

select deptno from emp

where not deptno = all (select deptno from dept where deptno=10);

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