6.Which four statements are true about database instance behavior?A) Redo log files can be renamed in mount state.B) Datafiles can be renamed in mount state.C) All dynamic performance views (v$ views) return data when queried from a session connected to an Instance in nomount state.D) An spfile ...【阅读全文】
为什么oracle要引入检查点机制?降低实例恢复的时间通过实验来简单观察下checkpointSQL> select file#,checkpoint_change# from v$datafile order by 1; FILE# CHECKPOINT_CHANGE#---------- ------------------ 1 &nb...【阅读全文】