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ocp题库怎么背:11g-051-V9.02-第165题

ocp题库怎么背:11g-051-V9.02-第165题

来源:优技教育    更新时间:2016/8/12 17:19:32    阅读次数:923

ocp题库怎么背:11g-051-V9.02-第165题,完整题库请点击这里联系老师咨询了解

165. View the Exhibit and examine the description for the CUSTOMERS table.

You want to update the CUST_INCOME_LEVEL and CUST_CREDIT_LIMIT columns for the customer

with the CUST_ID 2360. You want the value for the CUST_INCOME_LEVEL to have the same value as

that of the customer with the CUST_ID 2560 and the CUST_CREDIT_LIMIT to have the same value as

that of the customer with CUST_ID 2566.

Which UPDATE statement will accomplish the task?

A. UPDATE customers

SET cust_income_level = (SELECT cust_income_level

FROM customers

WHERE cust_id = 2560),

cust_credit_limit = (SELECT cust_credit_limit

FROM customers

WHERE cust_id = 2566)

WHERE cust_id=2360;

B. UPDATE customers

SET (cust_income_level,cust_credit_limit) = (SELECT

cust_income_level, cust_credit_limit

FROM customers

WHERE cust_id=2560 OR cust_id=2566)

WHERE cust_id=2360;

C. UPDATE customers

SET (cust_income_level,cust_credit_limit) = (SELECT

cust_income_level, cust_credit_limit

FROM customers

WHERE cust_id IN(2560, 2566)

WHERE cust_id=2360;

D. UPDATE customers

SET (cust_income_level,cust_credit_limit) = (SELECT

cust_income_level, cust_credit_limit

FROM customers

WHERE cust_id=2560 AND cust_id=2566)

WHERE cust_id=2360;

Answer: A

试题解析:

BC的子查询返回的是多行,所有报错。

D的子查询条件不正确,

题意说:更新CUST_ID为2360的CUST_INCOME_LEVEL和CUST_CREDIT_LIMIT列值。你想让CUST_INCOME_LEVEL的值与CUST_ID为2560的值一样,让CUST_CREDIT_LIMIT的值与CUST_ID为2566的值一样

按题意,只有A正确。

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