CREATE TABLE STUDENT
(	
	SID INT PRIMARY KEY IDENTITY,
	SNAME NVARCHAR(50),
	SAGE DATETIME,
	SSEX CHAR(4)
)
CREATE TABLE TEACHER
(
	TID INT PRIMARY KEY IDENTITY,
	TNAME NVARCHAR(50)
)
CREATE TABLE COURSE
(
	CID INT PRIMARY KEY IDENTITY,
	CNAME NVARCHAR(50),
	TID INT FOREIGN KEY REFERENCES TEACHER(TID)
)
CREATE TABLE SCORE
(
	ID INT PRIMARY KEY IDENTITY,
	SID INT FOREIGN KEY REFERENCES STUDENT(SID),
	CID INT FOREIGN KEY REFERENCES COURSE(CID),
	SCORES INT
)
 

–建立儲存過程，為學生表插入資料

GO
CREATE PROC P_INSERTSTU
@SNAME NVARCHAR(50),
@SAGE DATETIME,
@SSEX CHAR(4)
AS
BEGIN
	INSERT INTO STUDENT VALUES(@SNAME,@SAGE,@Ssex)
END

–建立觸發器，刪除學生資訊，刪除後打印出‘警告：XX同學已被刪除，請知曉！’

GO
CREATE TRIGGER T_DELETESTU
ON STUDENT
AFTER DELETE
AS
BEGIN
	DECLARE @STUNAME NVARCHAR(50)
	DELETE STUDENT WHERE SID IN (SELECT SID FROM DELETED)
	SELECT @STUNAME =SNAME FROM DELETED
	PRINT '警告：'
 
[email protected]+'同學已被刪除，請知曉！'
END

–建立觸發器，修改學生資訊，修改後打印出‘警告：XX同學已被修改為XX，請知曉！’

GO
CREATE TRIGGER T_UPDATESTU
ON STUDENT
AFTER UPDATE
AS
BEGIN
	DECLARE @STUNAMEUB NVARCHAR(50)
	DECLARE @STUNAMEUA NVARCHAR(50)
	SELECT @STUNAMEUA =SNAME FROM INSERTED
	SELECT @STUNAMEUB = SNAME FROM DELETED
	PRINT '警告：'
 
[email protected]+'同學已被修改為'[email protected]+'，請知曉！'
END

–建立一個標值函式，引數是SCORES 返回是為NVARCHAR(50)型別，在函式中使用CASE WHEN THEN END 為成績劃分等級>60 ‘不及格’ >70 ‘及格’>80‘中等’>100‘優秀’=100‘滿意’

GO
CREATE FUNCTION FUN_RANK(@SCORES INT)
RETURNS NVARCHAR(50)
AS
BEGIN
	DECLARE @RESTUCH NVARCHAR(50)
	SELECT @RESTUCH =
	(CASE WHEN @SCORES < 60 THEN '不及格',
		    WHEN @SCORES < 70 THEN '及格',
		    WHEN @SCORES < 80 THEN '中等,
		    WHEN @SCORES < 100 THEN '優秀',
		    WHEN @SCORES = 100 THEN '滿意,
	)
	RETURN @RESTUCH
END

–建立一個檢視，顯示學生編號，學生姓名，課程名稱，任課老師，以及呼叫標值函式為成績劃分等級

GO
CREATE VIEW V_STUDENT
AS
SELECT S.SID,S.SNAME,C.CNAME,T.TNAME,R.SCORES,DBO.FUN_RANK(R.SCORES) AS RANKS FROM STUDENT S JOIN SCORE R ON S.SID= R.SID JOIN COURSE C ON R.CID= C.CID JOIN TEACHER T ON T.TID = C.TID
GO

–使用行轉列對成績表重新劃分

SELECT 
SID,
MAX(CASE WHEN CID = 1 THEN SCORES ELSE NULL END) '語文',
MAX(CASE WHEN CID = 2 THEN SCORES ELSE NULL END) '數學',
MAX(CASE WHEN CID = 3 THEN SCORES ELSE NULL END) '英語',
 FROM SCORE GROUP BY SID

–建立一個儲存過程對成績分頁 ，輸出總記錄數

GO
CREATE PROC P_PAGESTU
@STUNAME NVARCHAR(20),
@PAGEINDEX INT,
@PAGESIZE INT,
@PAGECOUNT INT OUTPUT
AS
BEGIN 
	SELECT * FROM (
	SELECT R.SCORES,ROW_NUMBER() OVER(ORDER BY S.SID) AS NUM FROM STUDENT S JOIN SCORE R ON S.SID = R.SID WHERE S.SNAME LIKE '%'[email protected]+'%') TEMP WHERE TEMP.NUM BETWEEN ((@PAGEINDEX-1)*@PAGESIZE+1) AND (@PAGEINDEX*@PAGESIZE)
	SELECT @PAGECOUNT=COUNT(S.SID) FROM STUDENT S JOIN SCORE R ON S.SID = R.SID WHERE S.SNAME LIKE '%'[email protected]+'%' 
	)
END

–建立一個遊標，正確讀取學生的姓名即成績

DECLARE CURSOR_SCORE CURSOR SCROLL
FOR SELECT S.SNAME,R.SCORE FROM STUDENT S JOIN SCORE R ON S.SID= R.SID
OPEN CURSOR_SCORE
DECLARE @STUNAME NVARCHAR(20)
DECLARE @STUSCOR INT
FETCH FIRST FROM CURSOR_SCORE INTO @STUNAME,@STUCORE
WHILE @@FETCH_STATUS =0
BEGIN
	SELECT @STUNAME=S.SNAME,@STUSCORE = R.SCORES FROM STUDENT S JOIN SCORE R ON S.SID = R.SID 
	FETCH NEXT FROM CURSOR_SCORE INTO @STUNAME,@STUSCORE
END
PRINT @STUNAME +成績+CONVERT(NVARCHAR(20),@STUSCORE)
CLOSE CURSOR_SCORE
DEALLOCATE CURSOR_SCORE