【OCP-12c】CUUG最新考试原题整理及答案（071-11）

11、（5-8） 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”）

原文地址：http://blog.51cto.com/13854012/2350503

时间： 2025-01-07 09:16:03

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