未知题型

A.Foroneapplication,theusersessionrequiresthetimezonetobesettothelocaloperatingsystemtimezonewithoutaffectingotherusersessions.Whichtwosolutionscouldtheuserimplementtoachievethisobjective?()
A.usetheALTERSYSTEMcommandtochangethetimezone
B.usetheALTERSESSIONcommandtochangethetimezone
C.usetheALTERDATABASEcommandtochangethetimezone
D.setthevaluefortheoperatingsystemvariableORA_SDTZontheclientmachine
E.setthevaluefortheoperatingsystemvariableORA_SDTZonthedatabaseservermachine
【参考答案】

B, D