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SELECT sno FROM sc WHERE sname="数据库"AND grade=MAX(grad SELECT sno FROM sc FOR sname="数据库"OR grade>=MAX(grad SELECT sno FROM sc WHERE sname="数据库"AND grade=(SELECT MAX(grad FROM s SELECT sno FROM sc FOR sname="数据库"OR grade=(SELECT MAX(grad FROM s
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SELECT sname FROM student,SELECT cno,grade FROM sc WHERE studensno=ssno SELECT sname,cno,grade FROM student,course WHERE studensno=courscno SELECT sname,cname,grade FROM student,course,sc WHERE studensno=ssno and scno=course,cno SELECT sname,cno,grade FROM student,sc WHERE studensno=ssno
SELECT sno FROM SC WHERE sname="数据库"AND grade=MAX(grade) SELECT sno FROM SC FOR sname="数据库"OR grade>MAX(grade) SELECT sno FROM SC WHERE shame="数据库"AND grade=(SELECT MAX(grade)FROM sc) SELECT son FROM SC FOR sname="数据库"OR grade=(SELECT MAX(grade. FROM sc)
SELECT sno FROM sc WHERE sname = "数据库" AND grade = MAX(grade) SELECT sno FROM sc FOR sname = "数据库" OR grade>=MAX(grade) SELECT sno FROM sc WHERE sname = "数据库" AND grade = (SELECT MAX(grade) FROM sc) SELECT sno FROM sc FOR sname = "数据库" OR grade = (SELECT MAX(grade) FROM sc)
(Sno,Tno)和{Cno,Cname,Grade,Tno,Tname} (Sno, Cno,Tno) 和{Sno, Sname, Sex, Birthday, Cno} (Sno, Cno)和{Sno, Sname, Sex, Birthday, Cno, Cname, Grade} (Sno, Cno,Tno)和{Sno, Sname, Sex, Birthday, Tno, Tname}
SELECT sno FROM sc WHERE sname="数据库"AND grade=MAX(grad SELECT sno FROM sc FOR sname="数据库"OR grade>=MAX(grad SELECT sno FROM sc WHERE sname="数据库"AND grade=(SELECT MAX(gradFROM s SELECT sno FROM sc FOR sname="数据库"OR grade=(SELECT MAX(gradFROM s
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SELECT sno FROM sc WHERE sname="数据库"AND grade=MAX(grade) SELECT sno FROM sc FOR sname="数据库"OR grade>=MAX(grade) SELECT sno FROM sc WHERE sname="数据库"AND grade=(SELECT MAX(grade)
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