【OCP 12c】最新CUUG OCP-071考试题库(62题)

发布时间:2020-04-07 15:13:30 作者:cto_5359
来源:网络 阅读:438

62、(13-17)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:

推荐阅读:
  1. OCP考试的那段难忘的经历
  2. 【OCP题库-12c】最新CUUG OCP 071考试题库(70题)

免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。

ocp cuug 12c

上一篇:ACL访问控制列表之命名篇(实践)

下一篇:java与ui有哪些明显的区别

相关阅读

您好,登录后才能下订单哦!

密码登录
登录注册
其他方式登录
点击 登录注册 即表示同意《亿速云用户服务条款》