A.數(shù)據(jù)傳輸加密B.數(shù)據(jù)中不相關(guān)或不準(zhǔn)確的部分C.數(shù)據(jù)模型設(shè)計(jì)D.增加數(shù)據(jù)備份
A.數(shù)據(jù)傳輸加密B.數(shù)據(jù)的緊湊程度或信息量C.數(shù)據(jù)模型設(shè)計(jì)D.增加數(shù)據(jù)備份
A.數(shù)據(jù)傳輸加密B.部分更新數(shù)據(jù)而不是整體更新以提高效率C.數(shù)據(jù)模型設(shè)計(jì)D.增加數(shù)據(jù)存儲(chǔ)容量