ocp-478

QUESTION NO: 478

The BOOKINGS table contains online booking information. When a booking is confirmed, the details are

transferred to an archival table BOOKINGS_HIST and deleted from the BOOKINGS table. There is no fixed

time interval between each online booking and its confirmation. Because sufficient space is not always

available from the delete operations the high-water mark (HWM) is moved up and many rows are inserted

below the HWM of the table. The BOOKINGS table has Automatic Segment Space Management (ASSM)

and row movement enabled. The table is accessible in 24x7 mode.

What is the most efficient method to reclaim the space released by the delete

operations in the BOOKINGS table

A. Perform EXPORT, DROP, and IMPORT operations on the BOOKINGS table sequentially

B. Shrink the BOOKINGS table by using the ALTER TABLE… SHRINK SPACE command

C. Move the BOOKINGS table to a different location by using the ALTER TABLE… MOVE command

D. Deallocate the space in the BOOKINGS table by using the ALTER TABLE … DEALLOCATE UNUSED

command

Answer: B

预订表包含在线预订信息。当确认预订时，

细节被转移到预订历史档案表并从预订表中删除。没有固定的时间间隔在每条在线预订及确认之间。因为并不

总是从删除操作中得到足够的空间，高水位标记（ HWM）向上移动，许多行插入表的高水位标记以下。预订表

具有自动段空间管理（ ASSM）和启用行移动。该表在24x7模式下访问。

什么是最有效的方法回收预订表中的删除操作释放的空间

B.收缩预约表使用修改表…缩减空间命令