A.Thedatabasehasasubsetofthetablesintheproductionserverdatabase.
B.Thedatabasehasacopyofselecteddatafromtheproductiondatabase
C.Thedatabaselogschangesforlaterpropagation.
D.Thedatabaseisaccessedasread-onlytopreventdatacorruption.
E.Thedatabaseincludesalluserandorderdataforofflineprocessing.
参考答案：BC
