Oracle OCP 19c 认证1Z0-082考试题库(第20题)
Oracle OCP 19c 认证1Z0-082考试题库(第20题)-CUUG内部学员版082题库解析
20、choose two:
Examine the structure of the DEPARTMENTS table
Name Null? Type
------------------------
DEPARTMENT NOT NULL NUMBER(4)
DEPARTMENT_NAME NOT NULL VARCHAR2(30)
MANAGER_ID NUMBER(6)
LOCATION_ID NUMBER(4)
COUNTRY VARCHAR2(20)
You execute the following command:
SQL> ALTER TABLE departments
SET UNUSED (country);
Which two statements are true?
A) A new column, COUNTRY, can be added to the DEPARTMENTS table after executing the command.
B) Indexes created on the COUNTRY column exist until the DROP UNUSED COLUMNS command is executed.
C) Unique key constraints defined on the COUNTRY column are removed.
D) Synonyms existing on the DEPARTMENTS table would have to be re-created.
E) Views created on the DEPARTMENTS table that include the COUNTRY column are automatically modified and remain valid.
Oracle技术沙龙:【数据保护顶尖技术-MAA】首次全国首播12c MAA技术 云数据库加上MAA技术组成最豪华的技...
Oracle技术沙龙第49期:【Oracle 数据库云技术分享】Oracle技术沙龙第49期:【Oracle 数据库云技术分享】本次技术沙...
Oracle技术沙龙第48期:【Oracle 12c RAC安装】小编:今天讲什么内容呢?以后有什么用呢? 大师:今天讲的是12c...
- 我要参加技术沙龙