按列值更新mysql排名按列值分组

从这些例子开始

一,

二,

它们解释了如何计算按列值分组的秩。在我的情况下，发货

我需要更新“排名”栏的， 选择而不是

| iduser | ship  | score | rank  |
+--------+-------+-------+-------+
|   25   |   1   |   7   |   0   |
|   25   |   3   |  21   |   0   |
|   25   |   4   |  30   |   0   |
|   12   |   9   |  23   |   0   |
|   25   |   9   |  18   |   0   |
|   21   |   9   |   5   |   0   |

必须更新：

| iduser | ship  | score | rank  |
+--------+-------+-------+-------+
|   25   |   1   |   7   |   1   |
|   25   |   3   |  21   |   1   |
|   25   |   4   |  30   |   1   |
|   12   |   9   |  23   |   1   |
|   25   |   9   |  18   |   2   |
|   21   |   9   |   5   |   3   |

这是选择查询

SELECT  iduser,
        ship,
        score,
        ( 
            CASE ship 
            WHEN @curShip 
            THEN @curRow := @curRow + 1 
            ELSE @curRow := 1 AND @curShip := ship END
        ) AS rank
FROM    ship_stats,
        (SELECT @curRow := 0, @curShip := '') r
ORDER BY ship DESC, score DESC;

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那么您在寻找更新声明？对我需要更新：）为什么其中一个用户要为您编写代码。至少你自己试一试。如果您遇到问题，请回来问一个具体的问题。请提供您试图编写的代码的示例。我认为从标题中可以清楚地看出这一点。我做了选择。但是我还没能更新。示例在我创建的模式中。并在选择查询中。

SET @curship = 0,@curRow = 0;
UPDATE ship_stats 
SET rank := 
        (CASE ship 
            WHEN @curShip 
            THEN @curRow := @curRow + 1 
            ELSE @curRow := 1 AND @curShip := ship END
        )
ORDER BY ship DESC, score DESC;