【第62题】OCP认证1Z0-071最新考试题库及答案

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。

--------------------------------------------

071考题解析-第62题、choose the best answer:

You need to list the employees in DEPARTMENT_ID 30 in a single row, ordered by HIRE_DATE.

Examine the sample output:

Which query will provide the required output?

A) SELECT LISTAGG(last_name, '; ') "Emp_list", MIN(hire_date) "Earliest"

FROM employees

WHERE department_id = 30

WITHIN GROUP ORDER BY hire_date;

B) SELECT LISTAGG(last_name, '; ') "EMP_LIST", MIN(hire_date) "Earliest"

FROM employees

WHERE department_id = 30

ORDER BY hire_date;

C) SELECT LISTAGG(last_name, '; ')

WITHIN GROUP (ORDER BY hire_date) "Emp_list", MIN(hire_date) "Earliest"

FROM employees

WHERE department_id = 30;

D) SELECT LISTAGG(last_name)

WITHIN GROUP ORDER BY (hire_date) "Emp_list", MIN(hire_date) "Earliest"

FROM employees

WHERE department_id = 30;

Answer:C

(解析：工作中会用到把查出来的列的值去重合并成一行显示，可以使用 listagg() WITHIN GROUP () 将

多行合并成一行：

）

-----------------------------------------------

OCP解析公开课时间：【每周五晚8点】

OCP解析公开课地址：https://ke.qq.com/course/326223

OCP解析群资料分享：1015267481 验证：ocp

另外，除了OCP公开课，OCM题库直播也同步进行中，OCM最新题库大爆料-【每周四晚8点】，【微信群直播】，可以联系咨询老师进群参与