----------------------------------------------------------上機一
USE MySchool
GO
--查看錶Student中列的資訊
EXEC sp_columns Student  
--查看錶Student的所有資訊
EXEC sp_help Student
--查看錶Student的約束
EXEC sp_helpconstraint Student 
----------------------------------------------------------------
----------------------------------------------------------上機二
CREATE PROCEDURE usp_grade_subject
AS 
   SELECT GradeName,SubjectName,ClassHour FROM Grade 
   INNER JOIN Subject
   ON Grade.GradeId=Subject.GradeId
   ORDER BY Subject.GradeId,SubjectId
GO
EXEC usp_grade_subject
----------------------------------------------------------------
----------------------------------------------------------上機三
CREATE PROCEDURE usp_query_subject
  @GradeName VARCHAR(50) = NULL
AS 
  IF @GradeName IS NULL
    SELECT GradeName,SubjectName,ClassHour FROM Grade 
    LEFT JOIN Subject   ON Grade.GradeId=Subject.GradeId 
    UNION 
    SELECT GradeName,' ',SUM(ClassHour)FROM Grade
    LEFT JOIN Subject  ON Grade.GradeId=Subject.GradeId 
    GROUP BY GradeName
  ELSE
    SELECT GradeName,SubjectName,ClassHour FROM Grade
    LEFT JOIN Subject  ON Grade.GradeId=Subject.GradeId 
    WHERE 
 
[email protected]
    UNION
    SELECT GradeName,' ',SUM(ClassHour)FROM Grade
    LEFT JOIN Subject  ON Grade.GradeId=Subject.GradeId 
    WHERE [email protected]
    GROUP BY GradeName
GO
EXEC usp_query_subject 's2'
----------------------------------------------------------------
----------------------------------------------------------上機四
CREATE PROCEDURE usp_query_subject
   @CourseNum INT OUTPUT,  
   @HourNum INT OUTPUT,  
   @GradeName VARCHAR(50)
AS 
    IF LEN(@GradeName) = 0
       BEGIN
          PRINT '學期名稱不能為空'
          RETURN
       END
    PRINT '---------學期課程資訊如下------------'
    SELECT GradeName,SubjectName,ClassHour FROM Grade 
    LEFT JOIN Subject ON Grade.GradeId=Subject.GradeId 
    WHERE 
 
[email protected]

    SELECT @CourseNum=COUNT(0), @HourNum=SUM(ClassHour)
    FROM  Grade
    INNER JOIN Subject ON Grade.GradeId=Subject.GradeId 
    WHERE [email protected]
GO
----------------------------------------------------------------
----------------------------------------------------------上機五
CREATE PROCEDURE usp_insert_subject
    @SubjectNo int OUTPUT,
    @GradeId int OUTPUT,
	@GradeName varchar(50),
	@SubjectName varchar(50),
    @ClassHour int = 36
AS 
    DECLARE @errNum int
	SET @errNum = 0
	
	IF (LEN(RTRIM(@SubjectName))=0 OR LEN(RTRIM(@GradeName))=0)
		RETURN -1

    BEGIN TRANSACTION
    IF NOT EXISTS(SELECT * FROM Grade WHERE GradeName = @GradeName)
	  BEGIN
		INSERT INTO Grade (GradeName) VALUES (@GradeName)
		SET @errNum = @errNum + @@ERROR
		SELECT @
 
[email protected]@IDENTITY
	  END
	ELSE
		SELECT @GradeId=GradeId FROM Grade WHERE GradeName = @GradeName

	INSERT INTO Subject (SubjectName,ClassHour,GradeId) 
		VALUES (@SubjectName,@ClassHour,@GradeId)
	SET @errNum = @errNum + @@ERROR

	SELECT @[email protected]@IDENTITY

	IF (@errNum > 0)
	  BEGIN
		ROLLBACK TRANSACTION
		RETURN 0 
	  END
	ELSE
	  BEGIN
		COMMIT TRANSACTION
		RETURN 1
	  END
GO

--呼叫儲存過程
DECLARE @SubjectNo int
DECLARE @GradeId int
DECLARE @GradeName varchar(50)
DECLARE @SubjectName varchar(50)
DECLARE @ClassHour int
DECLARE @rt int

SET @GradeName = 'Y2'
SET @SubjectName = 'Linux'
SET @ClassHour = 10
EXEC @rt=usp_insert_subject @SubjectNo OUTPUT,@GradeId OUTPUT,@GradeName,@SubjectName,@ClassHour
IF (@rt = 1)
  BEGIN
	PRINT '增加課程'[email protected]+'記錄成功'
	PRINT '學期編號是' + CAST(@GradeId AS varchar(10)) + '，學期名稱是' + @GradeName
	PRINT '課程編號是' + CAST(@SubjectNo AS varchar(10)) + '，課程名稱是' + @SubjectName
  END
ELSE if (@rt = 0)
	PRINT '增加課程記錄失敗！'
ELSE
	PRINT '學期名稱或課程名稱不能為空，請重新執行！'
GO