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D.增加數(shù)據(jù)存儲容量
A.數(shù)據(jù)傳輸加密B.將數(shù)據(jù)從應(yīng)用程序中提取并存儲在外部系統(tǒng)中C.數(shù)據(jù)模型設(shè)計D.增加數(shù)據(jù)備份