单项选择题
Your database is in ARCHIVELOG mode. You have two online redo log groups，each of which contains one redo member. When you attempt to start the database， you receive the following errors：（）
A. ALTER DATABASE DROP LOGFILE GROUP 1 B. ALTER DATABASE CLEAR LOGFILE GROUP 1 C. ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 1 D. ALTER DATABASE DROP LOGFILE MEMBER ’D：\REDO01.LOG’
多项选择题 While deploying a new application module，the software vendor ships the application software along with appropriate SQL plan baselines for the new SQLs being introduced. Which two statements describe the consequences？（）
