ACCP S1 SQL第十一章上机练习
2016-11-25 15:01
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select GradeId,sum(ClassHour) as 总学时数 from Subject group by GradeId order by sum(ClassHour) select StudentNo,AVG(StudentResult) as '平均分' from Result group by StudentNo select SubjectId, AVG(StudentResult) as '平均分' from Result group by SubjectId order by AVG(StudentResult) desc select StudentNo,sum(StudentResult) as '总分' from Result group by StudentNo order by sum(StudentResult) desc
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select GradeId,COUNT(*)as '课程数' from Subject group by GradeId having sum(ClassHour)>50 select GradeId,AVG(DATEDIFF(dd,BornDate,GETDATE())/365)as '平均年龄' from Student group by GradeId select GradeId,COUNT(*)as '学生人数' from Student where Address like '北京%' group by GradeId select StudentNo,AVG(StudentResult)as '平均分' from Result group by StudentNo having AVG(StudentResult)>=60 order by AVG(StudentResult) desc select SubjectId,AVG(StudentResult)as '平均分' from Result where ExamDate='2013-03-22' and StudentResult>=60 group by SubjectId select StudentNo,count(StudentResult)as '不及格次数' from Result where StudentResult<60 group by StudentNo
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select StudentName,s.GradeId,phone from Student s inner join Grade g on s.GradeId=g.GradeId select GradeName,SubjectName,ClassHour from Subject j inner join Grade g on j.GradeId=g.GradeId where g.GradeId=1 select StudentName,StudentResult,ExamDate from Student s inner join Result r on s.StudentNo=r.StudentNo where SubjectId=1 select SubjectName,StudentResult,ExamDate from Result r inner join Subject s on s.SubjectId=r.SubjectId where StudentNo='S1101007' select StudentNo,SubjectName,StudentResult,ExamDate from Result r inner join Subject s on s.SubjectId=r.SubjectId where StudentResult<>0
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select s.StudentNo,StudentName,SubjectName,StudentResult from Student s inner join Subject j on j.GradeId=s.GradeId inner join Result r on r.StudentNo=s.StudentNo select StudentName,StudentResult,ExamDate from Student s inner join Subject j on j.GradeId=s.GradeId inner join Result r on r.StudentNo=s.StudentNo where SubjectName='面向对象程序设计'
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select SubjectName,StudentNo,StudentResult from Subject s left outer join Result r on r.SubjectId=s.SubjectId select SubjectName,StudentNo,StudentResult from Subject s left outer join Result r on r.SubjectId=s.SubjectId where StudentResult is null select GradeName,StudentNo,StudentName from Grade g left outer join Student s on s.GradeId=g.GradeId
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