A.max B.avg C.count D.substring
A.查詢(xún)輸出分組 B.設(shè)置查詢(xún)條件 C.對(duì)記錄排序 D.限制查詢(xún)返回的數(shù)據(jù)行
A.CREATE TABLE tab1 OF myOBJ B.CREATE TABLE myOBJ OF tab1 C.CREATE TABLE tab1 AS myOBJ D.CREATE TABLE tab1 TYPE OF myOBJ