sql - 如何明智地按一组增加列

Question

我有一张 table 叫 productLocation ，其数据结构如下，SQLFiddle

+--------------+-------------+-----------+
| FkLocationId | FkProductId | SortValue |
+--------------+-------------+-----------+
| 1            | 100         | 0         |
+--------------+-------------+-----------+
| 1            | 101         | 0         |
+--------------+-------------+-----------+
| 1            | 102         | 0         |
+--------------+-------------+-----------+
| 1            | 103         | 2         |
+--------------+-------------+-----------+
| 1            | 104         | 1         |
+--------------+-------------+-----------+
| 1            | 105         | 3         |
+--------------+-------------+-----------+
| 2            | 100         | 0         |
+--------------+-------------+-----------+
| 2            | 101         | 0         |
+--------------+-------------+-----------+
| 2            | 102         | 0         |
+--------------+-------------+-----------+
| 2            | 103         | 1         |
+--------------+-------------+-----------+
| 2            | 104         | 3         |
+--------------+-------------+-----------+
| 2            | 105         | 2         |
+--------------+-------------+-----------+
| 3            | 100         | 0         |
+--------------+-------------+-----------+
| 3            | 101         | 0         |
+--------------+-------------+-----------+
| 3            | 102         | 0         |
+--------------+-------------+-----------+
| 3            | 103         | 1         |
+--------------+-------------+-----------+
| 3            | 104         | 2         |
+--------------+-------------+-----------+

每个位置都有自己的产品排序顺序。但部分产品有 0 如 SortValue现在我需要写一个查询来更新 SortValue作为，

如果我考虑一个地点，FkLocationId = 1

+--------------+-------------+-----------+
| FkLocationId | FkProductId | SortValue |
+--------------+-------------+-----------+
| 1            | 100         | 0         |
+--------------+-------------+-----------+
| 1            | 101         | 0         |
+--------------+-------------+-----------+
| 1            | 102         | 0         |
+--------------+-------------+-----------+
| 1            | 103         | 2         |
+--------------+-------------+-----------+
| 1            | 104         | 1         |
+--------------+-------------+-----------+
| 1            | 105         | 3         |
+--------------+-------------+-----------+

在上面的数据表中，可以看到，FkProductId = 100,101,102有 0 如 SortValue .我需要更新它的 sortValue由 FkProductId 订购降序排列。我需要更新它喜欢

+--------------+-------------+-----------+
| FkLocationId | FkProductId | SortValue |
+--------------+-------------+-----------+
| 1            | 100         | 3         |
+--------------+-------------+-----------+
| 1            | 101         | 2         |
+--------------+-------------+-----------+
| 1            | 102         | 1         |
+--------------+-------------+-----------+

并且也一一更新之前的SortValue。

那么完整的输出应该是，

+--------------+-------------+-----------+
| FkLocationId | FkProductId | SortValue |
+--------------+-------------+-----------+
| 1            | 100         | 3         |
+--------------+-------------+-----------+
| 1            | 101         | 2         |
+--------------+-------------+-----------+
| 1            | 102         | 1         |
+--------------+-------------+-----------+
| 1            | 103         | 5         |
+--------------+-------------+-----------+
| 1            | 104         | 4         |
+--------------+-------------+-----------+
| 1            | 105         | 6         |
+--------------+-------------+-----------+

这是可能的吗？我真的很困惑，请帮我解决这个问题。谢谢

更新:

假设我有另一张 table 作为产品。其数据结构如下，

+-----------+-----------+
| ProdcutId | SortValue |
+-----------+-----------+
| 100       | 0         |
+-----------+-----------+
| 101       | 0         |
+-----------+-----------+
| 107       | 0         |
+-----------+-----------+
| 108       | 1         |
+-----------+-----------+
| 109       | 2         |
+-----------+-----------+
| 110       | 6         |
+-----------+-----------+
| 111       | 5         |
+-----------+-----------+
| 112       | 4         |
+-----------+-----------+
| 113       | 3         |
+-----------+-----------+

我也需要为这张 table 做同样的事情，我该怎么做

预期输出:

+-----------+-----------+
| ProdcutId | SortValue |
+-----------+-----------+
| 100       | 3         |
+-----------+-----------+
| 101       | 2         |
+-----------+-----------+
| 107       | 1         |
+-----------+-----------+
| 108       | 4         |
+-----------+-----------+
| 109       | 5         |
+-----------+-----------+
| 110       | 9         |
+-----------+-----------+
| 111       | 8         |
+-----------+-----------+
| 112       | 7         |
+-----------+-----------+
| 113       | 6         |
+-----------+-----------+

Answer 1

以下是一个示例查询，供您使用 CTE- 检查更新过程并使用相同的逻辑

DEMO HERE

重要提示:更新是一个冒险的过程，您应该先尝试使用您的测试数据。

WITH CTE
AS
(
    SELECT *,
    (
        SELECT COUNT(*) 
        FROM #Temp B 
        WHERE B.FkLocationId = A.FkLocationId
        AND SortValue = 0
    ) Zero_Count,
    -- The above Zero count is a simple count of rows with 0
    -- for a specific FkLocationId. This is for adding to other 
    -- rows where there are already value in column SortValue. The logic
    -- is simple, the number of row with 0 in column SortValue, 
    -- should be add to existing value where there is value not equal 0.
    ROW_NUMBER() OVER (PARTITION BY FkLocationId ORDER BY SortValue ASC, FkProductId DESC) RN
    -- ROW_NUMBER is simply creating the Number you should replace 0 by.
    -- As you are looking for 1 to start for the MAX FkProductId with 0,
    -- I applied DESC order on that column
    FROM #Temp A
) 

UPDATE A
SET A.SortValue = 
CASE 
    WHEN A.SortValue = 0 THEN B.RN 
    -- RN is created in such way, so that you can directly 
    -- Replace your value in column SortValue by RN if SortValue = 0 
    ELSE A.SortValue + B.Zero_Count
    -- IF SortValue contains already value > 0, 
    -- You need to just increment the value with Number 
    -- of rows is there with value 0. I have calculated that value
    -- by a sub query in the CTE you can check.
END
FROM  #Temp A
INNER JOIN CTE B ON A.FkLocationId = B.FkLocationId
AND A.FkProductId = B.FkProductId


SELECT * FROM #Temp

Just use your "table_name" where I have used #temp