题目是:
You are recovering a read-only tablespace and the last backup took place when the tablespace was read-write.What must ve done if an associated data file becomes crrrupt?
A reconver to the current time
B recover with a full databse backup
C Change the tablespace back to read-write mode and recover to the current time.
D recover to the time prior to when the tablespace was placed in read-only mode.
教材相关的内容是
Recovery Cases
Case 1 The tablespace being recovered is read-only, and was read-only when the
last backup occurred. In this case, you can simply restore the tablespace from the
backup. There is no need to apply any redo information.
Case 2 The tablespace being recovered is writable, but was read-only when the last
backup occurred. In this case, you need to restore the tablespace from the backup and
apply the redo information from the point when the tablespace was made writable.
Case 3 The tablespace being recovered is read-only, but was writable when the last
backup occurred. Because you should always back up a tablespace after making it
read-only, you should not experience this situation. However, if this does occur, you
must restore the tablespace from the backup and recover up to the time that the
tablespace was made read-only.
答案给的是d.我不知道是什么原因.教材相关的内容也没看懂.那位兄弟能给我讲一下呢?谢谢了---------------
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