結(jié)構(gòu)化查詢語言（SQL）單項(xiàng)選擇題每日一練(2020.05.20)

A.CHECK OPTION
B.ENCRYPTION
C.UNION
D.SCHEMABINGING

A.人工管理階段
B.文件管理階段
C.數(shù)據(jù)庫管理階段
D.智能管理階段

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 stu_name FROM student_info Where stu_grade=80 ORDER BY stu_id ASC;
B.SELECT stu_name FROM student_info WHERE stu_grade=80 ORDER BY stu_id DESC;
C.SELECT stu_id,stu_name FROM student_info WHERE stu_grade=80 ORDER BY stu_name ASC;
D.SELECT stu_name FROM student_info WHERE stu_grade LIKE 80 ORDER BY stu_id DESC;

A.數(shù)據(jù)能夠保存
B.數(shù)據(jù)無專門軟件進(jìn)行管理
C.數(shù)據(jù)能夠共享
D.數(shù)據(jù)具有獨(dú)立性