单项选择题 AcustomerhasrecentlyacquiredanXIVsystemwhichisupandrunning.Thenextphaseoftheirdatacenterrefreshistodoanon-disruptivedatamigrationoffolderEMCequipmentandbeginmanagingtheirentireenvironmentwhichalsoincludesHPandHDSstoragesubsystems.Whatsolutionshouldthestoragespecialistpropose?（）

单项选择题 Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2 (25) LAST_NAME VARCHAR2 (25) HIRE_DATE DATE Which UPDATE statement is valid? （）

单项选择题 The（）writestheFlashbackDatabaselogsintheflashrecoveryarea.