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043-105

原创 Linux操作系统 作者:jbymy2000 时间:2012-03-08 09:13:28 0 删除 编辑
105. Exhibit:
View the Exhibit.
You have more than one table in the recycle bin having the same origi
nal name, DEPT2. You do not have any table with the nameDEPT2 in your
schema. You executed the following command:
PURGE TABLE dept2;
Which statement is correct in this scenario?
A. All the tables having the same original name as DEPT2 will be purg
ed from the recycle bin.
B. The table with dropscn = 1928151 (oldest dropscn) will be purged f
rom the recycle bin.
C. The table with dropscn = 1937123 (most recent dropscn) will be pur
ged from the recycle bin.
D. None of the tables will be purged because there are multiple entri
es with the same original name in the recycle bin.
Answer: B
purge 从recycle 里面删除drop 掉的表
还原表按后进先出 (LIFO) 算法.
清除时,先进先出 (FIFO) 算法自动将回收站对象从回收站中清除.

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