YouhavetwodatabaseserversSEMPandSACCT.ThedatabaseintheSEMPservermaintainstheemployeeinformationandthedatabaseintheSACCTservermaintainstheaccountspayableinformation.Theemployeessubmittheexpensereportstotheaccountspayabledepartment.Auseroftheaccountspayable
题目
YouhavetwodatabaseserversSEMPandSACCT.ThedatabaseintheSEMPservermaintainstheemployeeinformationandthedatabaseintheSACCTservermaintainstheaccountspayableinformation.Theemployeessubmittheexpensereportstotheaccountspayabledepartment.AuseroftheaccountspayabledatabasewantstoextracttheemployeeinformationfromthedatabaseintheSEMPserverforcross-verification.Whichschemaobjectenablestheusertoaccesstheinformationfromtheremotedatabase（）
A.Cluster
B.Databaselink
C.Mappingtable
D.Materializedview
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参考答案和解析
参考答案：B