A.操作系統(tǒng)-->數(shù)據(jù)庫服務(wù)器-->數(shù)據(jù)庫-->數(shù)據(jù)庫對(duì)象
B.數(shù)據(jù)庫對(duì)象-->數(shù)據(jù)庫-->數(shù)據(jù)庫服務(wù)器-->操作系統(tǒng)
C.數(shù)據(jù)庫-->數(shù)據(jù)庫對(duì)象-->操作系統(tǒng)-->數(shù)據(jù)庫服務(wù)器
D.操作系統(tǒng)-->數(shù)據(jù)庫對(duì)象-->數(shù)據(jù)庫-->數(shù)據(jù)庫服務(wù)器