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ocp 11g认证题库大全:1Z0-051-114题

ocp 11g认证题库大全:1Z0-051-114题

来源:优技教育    更新时间:2016/8/5 14:42:57    阅读次数:947

ocp 11g认证题库大全:1Z0-051-114题,完整题库请点击这里联系老师咨询了解

114. View the Exhibit and examine the structure of the SALES table.

The following query is written to retrieve all those product ID s from the SALES table that have more than

55000 sold and have been ordered more than 10 times.

SQL> SELECT prod_id

FROM sales

WHERE quantity_sold > 55000 AND COUNT(*)>10

GROUP BY prod_id

HAVING COUNT(*)>10;

Which statement is true regarding this SQL statement?

A. It executes successfully and generates the required result.

B. It produces an error because COUNT(*) should be specified in the SELECT clause also.

C. It produces an error because COUNT(*) should be only in the HAVING clause and not in the WHERE clause.

D. It executes successfully but produces no result because COUNT(prod_id) should be used instead of COUNT(*).

Answer: C

试题解析:

因为COUNT(*)只能用在HAVING子句中,不能在WHERE子句中

where子句不能带组函数

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