2018年的OCP 11g题库解析暂告一段落,关于12c的OCP解析公开课正在进行中,课程包括071、062、063三个科目,这里为您带来的是最新版的071考试题库解析,帮大家顺利通过OCP的071考试。
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17.choose the best answer
View the Exhibit and examine the description of the EMPLOYEES table.
Evaluate the following SQL statement:
SELECT first_name, employee_id, NEXT_DAY(ADD_MONTHS(hire_date,6),1) "Review" FROM employees;
The query was written to retrieve the FIRST_NAME, EMPLOYEE_ID, and review date for employees. The review date is the first Monday after the completion of six months
of the hiring.
The NLS_TERRITORY parameter is set to AMERICA in the session.
Which statement is true regarding this query?
A) The query would not execute because the NEXT_DAY function accepts a string as argument.
B) The query would execute to give the desired output.
C) The query would not execute because date functions cannot be nested.
D) The query would execute but the output would give review dates that are Sundays.
Answer:D
(解析:题目的意思是显示某个时间以后第一个周一的日期,但是西方人的第一天是星期天,
所以应该修改为 NEXT_DAY(ADD_MONTHS(hire_date,6),2)
步骤:
SQL> alter session set NLS_TERRITORY=america;
SQL> select next_day(sysdate,2) from dual;
NEXT_DAY(SYSDA
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03-12 月-18 #这一天是周日
SQL> select next_day(sysdate,1) from dual;
NEXT_DAY(SYSDA
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02-12 月-18 #这一天是周一
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