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【第32题】OCP认证1Z0-071最新考试题库及答案

来源：优技培训时间：

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32题、choose the best answer:

Examine the structure of the BOOKS_TRANSACTIONS table.

You want to update this table such that BOOK_ID is set to 'INVALID' for all rows where no MEMBER_ID has been entered.

Examine this partial SQL statement:

SQL> UPDATE books_transactions

SET book_id = 'INVALID'

WHERE...............

Which condition must be used in the WHERE clause to perform the required update?

A) MEMBER_ID = "";

B) MEMBER_ID IS NULL;

C) MEMBER_ID = NULL;

D) MEMBER_ID = '';

Answer：B

(解析：该题的题眼在“where no MEMBER_ID has been entered”)

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