单项选择题
A. Start the database in OPEN mode， and create a new index tablespace.
B. Start the database in OPEN mode， and drop the lost index tablespace from the database.
C.Start the database in MOUNT mode， create a new index tablespace， and drop the lost index tablespace from the database.
D. Start the database in MOUNT mode， drop the lost index tablespace from the database， open the database， and create a new index tablespace.
单项选择题 Twenty database users are connected to your database. Five of the users are running long queries involving sort operations. The TEMP tablespace is the default temporary tablespace for your database. You are performing offline tablespace backups of individual tablespaces and erroneously execute the following statement： SQL>ALTER TABLSPACE temp OFFLINE NORMAL； What is the result of this statement？（）
单项选择题 You issue the following command on the RMAN prompt. RMAN> REPORT NEED BACKUP DAYS = 5 DATABASE； Which statement is true about executing this command？（）
单项选择题 YouaremaintainingyourdatabaseinOracle10g.Whileperforminganincrementalbackupofthedatabase，youwanttobackuponlythoseblocksthathavechangedsincethelastbackup.Whichfilewillyoucreatetoincreasetheperformanceofthebackupoperationwhileperformingtheincrementalbackupofthedatabase？（）