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按预定义顺序返回查询结果

更新时间:2023-01-21 22:04:51

我不认为这是可能的,但找到了一个 此处的博客条目 似乎是您所追求的类型:

I didn't think this was possible, but found a blog entry here that seems to do the type of thing you're after:

SELECT id FROM table WHERE id in (7,2,5,9,8) 
ORDER BY FIND_IN_SET(id,"7,2,5,9,8");

会给不同的结果

SELECT id FROM table WHERE id in (7,2,5,9,8) 
ORDER BY FIND_IN_SET(id,"8,2,5,9,7");

FIND_IN_SET 返回给它的第二个参数中 id 的位置,因此对于上面的第一种情况,7 的 id 在集合中的位置 1, 2 at 2 等等 - mysql 内部计算出类似

FIND_IN_SET returns the position of id in the second argument given to it, so for the first case above, id of 7 is at position 1 in the set, 2 at 2 and so on - mysql internally works out something like

id | FIND_IN_SET
---|-----------
7  | 1
2  | 2
5  | 3

然后根据FIND_IN_SET的结果进行排序.

then orders by the results of FIND_IN_SET.