多项选择题
Which two statements are true regarding a PL/SQL package body？（）
A.It cannot be created without a package specification.
B.It cannot invoke subprograms defined in other packages.
C.It can contain only the subprograms defined in the package specification.
D.It can be changed and recompiled without making the package specification invalid.
相关考题
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单项选择题
Youworkinadatawarehouseenvironmentthatinvolvestheexecutionofcomplexqueries.ThecurrentcontentoftheSQLcacheholdstheidealworkloadforanalysis.Youwanttoanalyzeonlyfewmostresource-intensivestatements.Whatwouldbeyoursuggestiontoreceiverecommendationsontheefficientuseofindexesandmaterializedviewstoimprovequeryperformance？（）
A.Run the SQL Access Advisor.
B.Run the SQL Tuning Advisor （STA）.
C.Run the Automatic Workload Repository （AWR） report.
D.Run the Automatic Database Diagnostic Monitor （ADDM）. -
多项选择题
WhichtwodatabaseoperationscanbeperformedattheMOUNTstageofdatabasestartup？（）
A.renaming of data files
B.dropping the database user
C.renaming of control files
D.multiplexing of control files
E.configuring the database in ARCHIVELOG mode -
多项选择题
YourdatabaseisinNOARCHIVELOGmode.Afterwhichtwooperationsyoushouldtakethebackupofcontrolfile？（）
A.adding a new user to the database
B.dropping a user from the database
C.dropping a table from the database
D.dropping a data file from a tablespace
E.adding a new tablespace to the database
