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【第6题】OCP认证1Z0-071最新考试题库及答案

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071考试不仅是OCP11g的考试科目，同时也是OCP 12c的考试科目，所以关心071考题的同学有很多，对此我们专门收集整理了近期071考试的原题，并对这些考题进行讲解，希望帮助广大考生顺利通过071考试。

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6. 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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