多项选择题
A.The tablespace would require recovery to go back online.
B.A checkpoint is taken on all data files that are associated with the SALES tablespace.
C.The sessions that subsequently try to access the objects in the SALES tablespace receive an error.
D.The new status of the SALES tablespace is recorded in the control file when the database instance is closed.
单项选择题 You execute a command to resize a data file， sales.dbf， of size 200 MB in your database： ALTER DATABASE DATAFILE ’/remorse/sales.dbf’ RESIZE 150M； Which statement is true about this command（）
单项选择题 Which statement is true regarding the effect of this command on the transaction in Scott’s session（）
多项选择题 WhichtablespacesaremandatoryinanOracledatabaseforittobeoperational（）