A.數(shù)據(jù)操作功能 B.數(shù)據(jù)定義功能 C.數(shù)據(jù)查詢功能 D.數(shù)據(jù)運行功能
A.DBMS B.MDBS C.DBS D.DDBS
A.修改數(shù)據(jù)庫 B.定義數(shù)據(jù)庫 C.應用數(shù)據(jù)庫 D.保護數(shù)據(jù)庫