多项选择题
A. when the schema of the user， SCOTT， was deleted by mistake 15 minutes ago
B. when the table EMP of the SCOTT schema was dropped by mistake 15 minutes ago
C. when some rows of the table， EMP， in the SCOTT schema were deleted by mistake 15 minutes ago
D. when some incorrect values were inserted in the EMP table in the user Scott’s schema during the last 15 minutes
E. never， because FLASHBACK TABLE is not a valid command in Oracle 10g.
单项选择题 You receive the following error： ORA-19804： cannot reclaim nnnnn bytes disk space from mmmmm limit Identify the reason for receiving the above error message？（）
多项选择题 Youdecidedtoconfiguretheflashrecoveryareainyourdatabasetocentralizethestorageofalltherecoveryfilesinacertainlocationondisk.Whichtwoparameterswillyouspecifyintheinit.orafile？（）
单项选择题 YouaremaintaininganOLTPdatabaseinOracle10g.YouhaveconfiguredtheFlashRecoveryAreainyourdatabase.TheFlashRecoveryAreaisfullbecauseyouhavesettheretentionpolicytoNONE.Whatwillyoudotoresolvetheproblem？（）