OCP考试题库以前是比较稳定的,但在2018年随着oracle的调整,不断的有新题出现,增加考试的难度,对此,我们专门收集整理了071的考试真题,分享给大家。
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071题库分享-第21题、choose the best answer
View the Exhibit and examine the description of the EMPLOYEES table.
You want to calculate the total remuneration for each employee. Total remuneration is the sum of the annual salary and the percentage commission earned for a year.
Only a few employees earn commission.
Which SQL statement would you execute to get the desired output?
A) SELECT first_name, salary, salary*12 + NVL(salary, 0)*commission_pct "Total"
FROM EMPLOYEES;
B) SELECT first_name, salary, salary*12+(salary*NVL2(commission_pct,
salary,salary+commission_pct)) "Total"
FROM EMPLOYEES;
C) SELECT first_name, salary, (salary + NVL(commission_pct,0)*salary)*12 "Total"
FROM EMPLOYEES;
D) SELECT first_name, salary, salary*12+salary*commission_pct "Total"
FROM EMPLOYEES;
Answer:A
(解析:题眼是“Only a few employees earn commission”,说明有人的佣金是 null,所
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