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Oracle 19c OCP 认证考试 082 题库(第18题)- 2024年修正版

【优技教育】Oracle 19c OCP 082题库(Q 18题)- 2024年修正版

考试科目:1Z0-082

考试题量:90

通过分数:60%

考试时间:150min

本文为(CUUG 原创)整理并解析,转发请注明出处,禁止抄袭及未经注明出处的转载。

原文地址:http://www.cuug.com.cn/ocp/082kaoshitiku/38219540954.html

第18题:

Q 18、

Choose the best answer.

Examine the description of the EMPLOYEES table:

    Name                 Null?                 Type

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

    EMPLOYEE_ID      NOT NULL         NUMBER(4)

    EMPLOYEE_NAME   NOT NULL      VARCHAR2 (100)

    SALARY              NOT NULL           NUMBER(6,2) .

    DEPARTMENT_ID   NOT NULL      NUMBER(4)

Which statement will fail?

A) SELECT department_id, COUNT(*)

    FROM employees

    WHERE department_id <> 90

    HAVING COUNT(*) >= 3

    GROUP BY department_id;

B) SELECT department_id, COUNT (*)

    FROM employees

    WHERE department_id <> 90

    AND COUNT(*) >= 3

    GROUP BY department_id;

C) SELECT department_id, COUNT (*)

    FROM employees

    WHERE department_id < 90

    GROUP BY department_id

    HAVING COUNT(*) >= 3;

D) SELECT department_id, COUNT (*)

    FROM employees

    HAVING department_id < 90

    AND COUNT(*) >= 3

    GROUP BY department_id;

Answer:B

(解析:D 答案是出人意料可以执行成功,原因是 having 放在了前面,它是 having 语句中的 and 条件,所以允许用到分组函数。)

 

Oracle 19c OCP认证需要到Oracle指定的WDP机构,有了培训记录之后才能考试,考试需要考2科,分别是082(60%及格)和083(57%及格),两科都通过之后才能拿到证书。证书如下:

 

posted @ 2024-09-10 13:31  cnblogs_5359  阅读(4)  评论(0编辑  收藏  举报