A.數(shù)據(jù)查詢 B.數(shù)據(jù)刪除 C.數(shù)據(jù)插入 D.數(shù)據(jù)修改
A.一對(duì)一 B.一對(duì)多 C.多對(duì)多 D.多對(duì)一
A.insert B.delete C.create D.DROP E.update F.select