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单项选择题
A.仅Student表
B.仅Student和SC表
C.仅Student和Course表
D.Student、SC和Course表
单项选择题
A.INSERT INTO Teachers VALUES(’T100’,’张宏’,NULL)
B.INSERT INTO Teachers(Tno,Tname,Age) VALUES(’T100’,’张宏’,30)
C.INSERT INTO Teachers(Tno,Tname) VALUES(’T100’,’张宏’)
D.INSERT INTO Teachers VALUES(’T100’,’张宏’)
单项选择题
A. Case Grade When 90~100 THEN ’优’ When 80~89 THEN ’良’ When 70~79 THEN ’中’ When 60~69 THEN ’及格’ Else ’不及格’ End
B. Case When Grade between 90 and 100 THEN Grade = ’优’ When Grade between 80 and 89 THEN Grade = ’良’ When Grade between 70 and 79 THEN Grade = ’中’ When Grade between 60 and 69 THEN Grade = ’及格’ Else Grade = ’不及格’ End
C. Case When Grade between 90 and 100 THEN ’优’ When Grade between 80 and 89 THEN ’良’ When Grade between 70 and 79 THEN ’中’ When Grade between 60 and 69 THEN ’及格’ Else ’不及格’ End
D.Case Grade When 90~100 THEN Grade = ’优’ When 80~89 THEN Grade = ’良’ When 70~79 THEN Grade = ’中’ When 60~69 THEN Grade = ’及格’ Else Grade = ’不及格’ End
单项选择题
A.SELECT Sname,MIN(Sage) FROM Student
B.SELECT Sname,Sage FROM Student WHERE Sage = MIN(Sage)
C.SELECT TOP 1 Sname,Sage FROM Student
D.SELECT TOP 1 Sname,Sage FROM Student ORDER BY Sage
单项选择题
A.SELECT Sno, COUNT(*) FROM SC GROUP BY Sno
B.SELECT Sno FROM SC GROUP BY Sno WHERE COUNT(*)> 3
C.SELECT Sno FROM SC GROUP BY Sno HAVING COUNT(*)> 3
D.SELECT Sno FROM SC GROUP BY Sno