OCP-1Z0-053-V12.02-70题

70.You executed the following SQL statement to shrink the EMPLOYEES table segment stored in the

EXAMPLE tablespace:

ALTER TABLE employees SHRINK SPACE CASCADE;

Which statement is correct in this scenario?

A. The EMPLOYEES table will be changed to read-only mode during the shrink operation.

B. The indexes created on the EMPLOYEES table will need to be rebuilt after the shrink operation is over.

C. The shrink behavior will be cascaded to all dependent segments of the table that support a shrink

operation.

D. Data manipulation language (DML) operations will not be possible on the EMPLOYEES table during

the COMPACTION phase of the shrink operation.

Answer: C

答案解析：

参考：http://blog.csdn.net/rlhua/article/details/13431595

使用SHRINK SPACE子句可以收缩段中的空间。如果指定了CASCADE，则收缩行为将级联到所有支持收缩操作的从属段，但实体化视图、LOB 索引和IOT（索引表）映射表例外。