ocp考試題庫(kù)：11g-1Z0-051-v9.02-015題，完整題庫(kù)請(qǐng)點(diǎn)擊這里聯(lián)系老師咨詢了解

15. View the Exhibit and examine the data in the CUSTOMERS table.

Evaluate the following query:

SQL> SELECT cust_name AS "NAME", cust_credit_limit/2 AS MIDPOINT,MIDPOINT+100 AS "MAX

LOWER LIMIT"

FROM customers;

The above query produces an error on execution.

What is the reason for the error?

A. An alias cannot be used in an expression.

B. The a lias NAME should not be enclosed with in double quotation marks .

C. The MIDPOINT+100 expression gives an error because CUST_CREDIT_LIMIT contains NULL

values.

D. The a lias MIDPOINT should be enclosed with in double quotation marks for the

此題答案選A