游标简单的使用

GO

/****** Object:  StoredProcedure [dbo].[UP_Job_UpdatePromotionBeginInfo]    Script Date: 08/19/2014 19:02:11 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

 ALTER PROCEDURE [dbo].[UP_Job_UpdatePromotionBeginInfo]
AS
    BEGIN 
        DECLARE MyFirstCursor CURSOR
        FOR
            SELECT  a.ProductProID ,
                    a.productItemid ,
                    p.productid ,
                    a.ProPromKindID ,
                    a.PromPrice,
                    --新添加五个字段
                    a.IsLimitBuyStatus,
                    a.LimitBuyPersonalCount,
                    a.LimitBuyCount,
                    a.bDate,
                    a.eDate
            FROM    ProductPro a
                    INNER JOIN productitem item ON a.productitemid = item.productitemid
                    INNER JOIN product p ON p.productid = item.productid
            WHERE   a.BDate <= GETDATE()
                    AND a.EDate >= GETDATE()
                    AND a.[State] = 0

        OPEN MyFirstCursor

        DECLARE @ProductProID INT
        DECLARE @productItemid INT
        DECLARE @productid INT
        DECLARE @ProPromKindID INT
        DECLARE @num INT 
        DECLARE @PromPrice MONEY
        --新添加五个字段
        DECLARE @IsPur INT
        DECLARE @OnePurNum INT
        DECLARE @TotalPurNum INT
        DECLARE @StartDate DATETIME
        DECLARE @LastDate DATETIME
        FETCH NEXT FROM MyFirstCursor INTO @ProductProID, @productItemid, @productid, @ProPromKindID, @PromPrice,@IsPur,@OnePurNum,@TotalPurNum,@StartDate,@LastDate
        WHILE ( @@FETCH_STATUS = 0 )
            BEGIN
   --修改ProductPro 状态     
                UPDATE  dbo.ProductPro
                SET     [State] = 1
                WHERE   ProductProID = @ProductProID

                UPDATE TOP ( 1 )
                        product
                SET     ProductAttributeID = @ProPromKindID ,
                        Price = @PromPrice ,
                        Price2 = @PromPrice
                WHERE   productid = @productid
         
                UPDATE TOP ( 1 )
                        productitem
                SET     OldPrice = price ,
                        price = @PromPrice
                        --新添加五个字段
                        ,IsPur=@IsPur
                        ,OnePurNum=@OnePurNum
                        ,TotalPurNum=@TotalPurNum
                        ,StartDate=@StartDate
                        ,LastDate=@LastDate
                WHERE   productitemid = @productItemid

    --xia 20140218 限制团购数量 改动
                SELECT  @num = LimitNum
                FROM    dbo.ProductPro
                WHERE   ProductProID = @ProductProID
                UPDATE  productitem
                SET     StoreNum = @num
                WHERE   ProductItemID = @productItemid
               
           
    
         
            --读取下一行
                FETCH NEXT FROM MyFirstCursor INTO @ProductProID,
                    @productItemid, @productid, @ProPromKindID, @PromPrice
            END
    --关闭游标
        CLOSE MyFirstCursor
    --删除游标
        DEALLOCATE MyFirstCursor
   
  
    END