數據庫設計第六章上機題

練習1：批量插入學生考試成績

BEGIN TRANSACTION
DECLARE @errorSum INT
SET @errorSum=0
/*--插入數據--*/
INSERT INTO Result(StudentNo,SubjectNo,ExamDate,StudentResult)
            VALUES(1,1,GETDATE(),90)
SET @errorSum=@errorSum+@@error
INSERT INTO Result(StudentNo,SubjectNo,ExamDate,StudentResult)
            VALUES(1,1,GETDATE(),70)
SET @errorSum=@errorSum+@@error
INSERT INTO Result(StudentNo,SubjectNo,ExamDate,StudentResult)
            VALUES(2,1,GETDATE(),67)
SET @errorSum=@errorSum+@@error
INSERT INTO Result(StudentNo,SubjectNo,ExamDate,StudentResult)
            VALUES(2,1,GETDATE(),55)
SET @errorSum=@errorSum+@@error
INSERT INTO Result(StudentNo,SubjectNo,ExamDate,StudentResult)
            VALUES(3,1,GETDATE(),102)--分數違反約束
SET @errorSum=@errorSum+@@error
INSERT INTO Result(StudentNo,SubjectNo,ExamDate,StudentResult)
            VALUES(3,4,GETDATE(),90)
SET @errorSum=@errorSum+@@error
INSERT INTO Result(StudentNo,SubjectNo,ExamDate,StudentResult)
            VALUES(4,4,GETDATE(),56)
SET @errorSum=@errorSum+@@error
INSERT INTO Result(StudentNo,SubjectNo,ExamDate,StudentResult)
            VALUES(4,4,GETDATE(),88)
SET @errorSum=@errorSum+@@error
INSERT INTO Result(StudentNo,SubjectNo,ExamDate,StudentResult)
            VALUES(5,4,GETDATE(),40)
SET @errorSum=@errorSum+@@error
INSERT INTO Result(StudentNo,SubjectNo,ExamDate,StudentResult)
            VALUES(5,4,GETDATE(),65)
SET @errorSum=@errorSum+@@error

/*--根據是否有錯誤，確定事務是提交還是撤銷--*/
IF(@errorSum<>0) --如果有錯誤
  BEGIN
    PRINT '插入失敗，回滾事務'
    ROLLBACK TRANSACTION 
  END  
ELSE
  BEGIN
    PRINT '插入成功，提交事務'
    COMMIT TRANSACTION   
  END
GO

練習2：辦理畢業學生離校手續

BEGIN TRANSACTION
DECLARE @errorSum INT
SET @errorSum=0
/*--查詢Result表中所有Y2學員的考試成績，保存到新表HistoreResult*/
SELECT Result.* INTO HistoreResult 
FROM Result INNER JOIN Student ON Result.StudentNo=Student.StudentNo
INNER JOIN Grade ON Grade.GradeId=Student.GradeId 
WHERE GradeName='Y2'
SET @errorSum=@errorSum+@@error

/*--刪除Result表中所有Y2學員的考試成績*/
DELETE  Result FROM  Result JOIN Student ON Result.StudentNo=Student.StudentNo
INNER JOIN Grade ON Grade.GradeId=Student.GradeId 
WHERE GradeName='Y2'
SET @errorSum=@errorSum+@@error

/*--將Student表中所有Y2的學員記錄，保存到新表HistoryStudent*/
SELECT Student.* INTO HistoryStudent
FROM Student INNER JOIN Grade ON Grade.GradeId=Student.GradeId 
WHERE GradeName='Y2'
SET @errorSum=@errorSum+@@error

/*--刪除Studet表中所有Y2學員記錄*/
DELETE Student FROM Student 
INNER JOIN Grade ON Grade.GradeId=Student.GradeId 
WHERE GradeName='Y2'
SET @errorSum=@errorSum+@@error

/*--根據是否有錯誤，確定事務是提交還是撤銷--*/
IF (@errorSum<>0) --如果有錯誤
  BEGIN
    PRINT '插入失敗，回滾事務'
    ROLLBACK TRANSACTION 
  END  
ELSE
  BEGIN
    PRINT '插入成功，提交事務'
    COMMIT TRANSACTION   
  END
GO

練習3：查看各學生各學期總成績

CREATE VIEW vw_student_result_info
AS
  SELECT 姓名=StudentName,學號=Student.StudentNo,
                 聯繫電話=Phone,學期=GradeName,成績=Total
  FROM Student
  LEFT OUTER JOIN (
      SELECT r.StudentNo,GradeName,SUM(StudentResult) Total 
      FROM Result r 
      INNER JOIN (
         SELECT StudentNo,SubjectNo,MAX(ExamDate)  ExamDate 
         FROM Result 
         GROUP BY StudentNo,SubjectNo) tmp 
      ON r.ExamDate=tmp.ExamDate
      AND r.SubjectNo = tmp.SubjectNo AND r.StudentNo = tmp.StudentNo
      INNER JOIN Subject sub ON sub.SubjectNo = r.SubjectNo
      INNER JOIN Grade g ON g.GradeId = sub.GradeId
      GROUP By r.StudentNo,GradeName ) TmpResult2 
 ON Student.StudentNo = TmpResult2.StudentNo
 GROUP BY StudentName,Student.StudentNo,Phone,GradeName,Total
GO
SELECT * FROM vw_student_result_info

練習4：使用索引查詢學生考試成績

USE MySchool
GO

IF EXISTS (SELECT name FROM sysindexes
          WHERE name = 'IX_Result_StudentResult')
   DROP INDEX Result.IX_Result_StudentResult  --刪除索引
GO

--考試成績列上創建可重複索引：填充因子爲70％--
CREATE INDEX IX_Result_StudentResult
   ON Result(StudentResult)
       WITH FILLFACTOR = 70
GO


--查詢輸出學生姓名、課程名稱、考試日期和考試成績 
SELECT StudentName '學生姓名',SubjectName '課程名稱',ExamDate '考試日期', StudentResult '考試成績' FROM Subject,Student,Result
WITH (INDEX = IX_Result_StudentResult)
WHERE StudentResult BETWEEN 80 AND 90 AND Student.StudentNo = Result.StudentNo AND Subject.SubjectId = Result.SubjectId