存储过程

--添加
CREATE PROCEDURE p_StudentAdd
    @StudentName VARCHAR(50),
    @Gender SMALLINT,
    @ClassesCode INT
    
AS
BEGIN
    BEGIN TRAN 
        BEGIN TRY
            INSERT INTO dbo.Student
                    ( StudentName, Gender, ClassesCode )
            VALUES  (@StudentName, -- StudentName - varchar(50)
                      @Gender, -- Gender - smallint
                      @ClassesCode  -- ClassesCode - int
                      )

            COMMIT TRAN
        END TRY


        BEGIN CATCH
            ROLLBACK TRAN
        END CATCH
    


END
GO
--删除
CREATE PROCEDURE p_StudentDel
    @ID INT 
AS 
BEGIN 
    DELETE FROM dbo.Student WHERE ID=@ID

END


GO

--修改
CREATE PROCEDURE p_StudentUpt
    @StudentName VARCHAR(50),
    @Gender SMALLINT,
    @ClassesCode INT,
    @ID INT 
AS 
BEGIN
    UPDATE dbo.Student SET StudentName=@StudentName,Gender=@Gender,ClassesCode=@ClassesCode WHERE ID=@ID

END
    
GO
    
--显示+分页+模糊查询
ALTER PROCEDURE p_GetStudentList
    @PageIndex int ,--当前页
    @Pagesize FLOAT,--每页显示条数
    @PageCount INT OUTPUT,--总页数
    @StudentName VARCHAR(50),
    @ClassesCode VARCHAR(50)     

AS
BEGIN
    BEGIN TRAN  
        BEGIN TRY
        --定义变量存储sql语句
        DECLARE @sql NVARCHAR(max)
　　　　　　　　--三表联查条件恒真
            SET @sql=‘SELECT a.ID,a.StudentName,a.Gender,b.ClassesCode,b.ClassesName,c.SchoolCode,
                        c.SchoolName,ROW_NUMBER() OVER(ORDER BY a.ID) rownum  FROM dbo.Student a INNER JOIN dbo.Classes b
                        ON b.ClassesCode = a.ClassesCode INNER JOIN dbo.School c ON c.SchoolCode = b.SchoolCode where 1=1 ‘
            IF(@StudentName!= ‘‘)
                SET @sql+=‘ and a.StudentName=‘‘‘+@StudentName+‘‘‘‘;
            IF (@ClassesCode!=‘‘)
                SET @sql+=‘ and b.ClassesCode=‘‘‘+@ClassesCode+‘‘‘‘;
        DECLARE @sql2 NVARCHAR(max)
　　　　　　　　--分页
            SET @sql2=‘SELECT * FROM (‘+@sql+‘) t WHERE t.rownum BETWEEN ‘+STR(((@PageIndex-1)*@Pagesize+1)) +‘AND‘+ STR(@PageIndex*@Pagesize)
            PRINT @sql2
            EXEC (@sql2)

            DECLARE @count FLOAT --总条数
            EXEC (@sql)
                SET @count=@@ROWCOUNT --总条数等于受影响行数
                SET @PageCount=CEILING(@count/@Pagesize)--总页数等于总条数除以每页显示条数，取整
        
            COMMIT TRAN 
        END TRY
        

        BEGIN CATCH
            ROLLBACK TRAN
        END CATCH


END
 
GO 
 DECLARE @PageCount INT 
 EXEC p_GetStudentList 1,2,@PageCount OUTPUT,‘张三‘,1