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【071考试】最新OCP认证071考试题库整理-第6题

【071考试】最新OCP认证071考试题库整理-第6题

来源:CUUG培训-优技培训    更新时间:2019/5/20 13:15:38    阅读次数:

071考试题库之前是比较稳定的,但随着Oracle的调整,071考试不断的增加新的考题,增加了考试的难度,所以我们专门收集整理了这些考试,并对这些考题进行解析,希望可以对考生有帮助。

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071考试-第6题、choose the best answer

In the EMPLOYEES table there are 1000 rows and employees are working in the company for more than 10 years.

Evaluate the following SQL statement:

SQL> UPDATE employees

SET salary = NVL(salary,0) + NVL(comm,0),comm = NVL(comm,0)

WHERE hire_date < SYSDATE - 600;

What would be the result?

A) It gives an error because NVL function cannot be used with UPDATE.

B) It gives an error because multiple NVL functions are used in an expression.

C) It executes successfully and updates the records of those employees who have been working in the company for more than 600 days.

D) It executes successfully but no rows updated.

Answer:C

(SQL> update emp

2 set sal=nvl(sal,0)+nvl(comm,0),comm=nvl(comm,0)

3 where hiredate < sysdate - 100;

已更新 14 行。

)

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