未知题型 Thecurrenttimezoneforoneoftheusersessionsissettothedatabaselocaltimezone.Foroneapplication，theusersessionrequiresthetimezonetobesettothelocaloperatingsystemtimezonewithoutaffectingotherusersessions.Whichtwosolutionscouldtheuserimplementtoachievethisobjective？（）A.usetheALTERSYSTEMcommandtochangethetimezoneB.usetheALTERSESSIONcommandtochangethetimezoneC.usetheALTERDATABASEcommandtochangethetimezoneD.setthevaluefortheoperatingsystemvariableORA_SDTZontheclientmachineE.setthevaluefortheoperatingsystemvariableORA_SDTZonthedatabaseservermachine

未知题型 Whichthreebuilt－inscanyouusetonavigatebetweenformsinvokedwiththeOPEN_FORMbuilt－in?（）

未知题型 Identifytwocorrectstatementstocompletethesentance.InaCoherenceimplementation，itisabestpracticetoimplementPortableObjectonallcustomerobjectsbecause：（）