【第41題】【062題庫】2019年OCP認證062考試新題

41題、choose one

Examine the details of the uncompressed, non-partitioned heap table CITIES.

Name                 Null?                     Type

CITYID                 NOT NULL           NUMBER (4)

CITY_NAME                                     VARCHAR2 (50)

Examine the command:

SQL>ALTER TABLE cities SHRINK SPACE COMPACT;

What must you do before executing it?

A) Ensure there are no pending transactions on the table.

B) Disable all indexes on the table .

C) Ensure free space that is approximately equal to the space used by the table should be available.

D) Enable row movement is enabled.

Answer：D

(解析：想要shrik表的空間，因爲要涉及到行的移動，所以要先把行移動功能打開。來自3組：1015267481)