sql - SQL SP 迭代算法

Question

我的存储过程需要一点帮助。

我想遍历结果中的一组列并获取每个值并查找相应的值，然后将所有这些加在一起。

我能看到的唯一方法是为每周位置和每周分数使用单独的变量加上单独的选择语句。谁能帮我？这显然不利于可扩展性。

存储过程

 @pName varchar(50) = ''
AS
BEGIN


  Declare @p1 int = 0
  Declare @p2 int = 0
  Declare @s1 int = 0
  Declare @s2 int = 0
  Declare @pUserID int = 0
  Declare @pTotal int = 0


  set @pUserID = (Select UserID from PKR_USERS where UserName = @pName)

  set @p1 = (Select WEEK1POS From PKR_TOURNAMENT12)
  set @p2 = (Select WEEK2POS From PKR_TOURNAMENT12)

  set @s1  = (Select Points from PKR_SCORING where Position = @p1)
  set @s2  = (Select Points from PKR_SCORING where Position = @p2)

  set @pTotal = @s1 + @s2

  Update PKR_RESULTS set points = @pTotal Where UserID =  @pUserID
END

> PKR_Tournament12 Table 
> 
> [USERID][WEEK1POS][WEEK2POS] 1    1   1

PKR_评分表

[位置][积分] 1 10 2 9

提前致谢

Answer 1

嗨试试这个我用过 UNPIVOT 请测试一下

Declare @pTotal int = ISNULL(
  SELECT SUM(ISNULL(Points)) FROM PKR_SCORING where Position  IN (
   SELECT FieldValue
FROM
(
  SELECT 
     WEEK1POS ,
     WEEK2POS 
  FROM dbo.PKR_TOURNAMENT12 WHERE USERID=(Select UserID from PKR_USERS where UserName = @pName)
) MyTable
 UNPIVOT
(FieldValue FOR FieldCode IN (WEEK1POS, WEEK2POS))AS MyUnPivot),0)
Update PKR_RESULTS set points = @pTotal Where UserID =  @pUserID