A.部門經(jīng)理 B.部門成員 C.部門名 D.部門號
A.數(shù)據(jù)查詢 B.數(shù)據(jù)操縱 C.數(shù)據(jù)定義 D.數(shù)據(jù)控制
A.select sname,age from xsb where age>20and age<23 B.select*from xsb where age between20 and 23 C.select sname,age from xsb where agebetween20 and 23