A、正确
B、错误
答案:A
A、正确
B、错误
答案:A
A. LEFT
B. RIGHT
C. FULL JOIN
D. LEFT OUTER JOIN
A. WHERE 成绩> ALL(SELECT 成绩 FROM Sc)
B. WHERE 成绩>=ALL(SELECT 成绩 FROM Sc)
C. WHERE 成绩>ANY(SELECT 成绩 FROM Sc)
D. WHERE 成绩>=ANY(SELECT 成绩 FROM Sc)
A. EXISTS
B. DISTINCT
C. NOT EXISTS
D. COUNT
A. 正确
B. 错误
A. is
B. allOf
C. describedAs
D. containsString
A. 正确
B. 错误
A. 正确
B. 错误
A. WHERE 9 > 60 and g <80
B. WHERE g >= 60 and g < 80
C. WHERE g > 60 and g<= 80
D. WHERE g > = 60 and g <= 80