【12c OCP】最新OCP 12c题库考试原题（071-45题）

文章来源：更新时间:2019/2/25 15:13:10

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45、(9-16)choose the best answer:

View the Exhibit and examine the data in the EMPLOYEES table.

You want to generate a report showing the total compensation paid to each employee to date(迄今为止支付给每位员工的总补偿).

You issue the following query:

SQL>SELECT ename ||' joined on '|| hiredate ||

', the total compensation paid is '||

TO_CHAR(ROUND(ROUND(SYSDATE-hiredate)/365) * sal + comm)

"COMPENSATION UNTIL DATE"

FROM employees;

What is the outcome?

A) It executes successfully and gives the correct output.

B) It generates an error because the usage of the ROUND function in the expression is not valid.

C) It generates an error because the concatenation operator can be used to combine only two items.

D) It generates an error because the alias is not valid.

E) It executes successfully but does not give the correct output.

Answer：E

(解析：因为 comm 列上有空值，所以会导致某些计算的结果为空)