php - php mysql 按获取的顺序对结果进行排序

Question

使用 IN 语句时，如何按数组中 id 的顺序对得到的结果进行排序：

SELECT id,name from table WHERE id IN (23, 33, 55, 2)

我想得到：

+----+---------+
| id | name    |
+----+---------+
| 23 | name1   |
| 33 | name2   |
| 55 | name3   |
|  2 | name4   |
+----+---------+

按此顺序

Answer 1

只需在查询末尾添加：

order by field(id, 23, 33, 55, 2)

Answer 2

您可以尝试使用 JOIN。不能保证按此顺序返回，但对于 MySQL，这在大多数情况下都是正确的：

SELECT table.id, table.name
FROM ( 
  SELECT 23 id UNION SELECT 33 id UNION SELECT 55 id UNION SELECT 2
) a
JOIN table
ON a.id = table.id

您的订单是如何确定的？如果您可以提供排序功能，它就会变得容易。

Answer 3

SELECT id,name from table WHERE id IN (23, 33, 55, 2) ORDER BY FIELD (id, 2, 23, 33, 55)

Answer 4

你可以尝试这样的事情：

SELECT t.id,t.name 
from 
    (select 23 as id,1 as rnk union all 
     select 33 as id,2 union all
     select 55 as id,3 union all
     select 2 as id,4 )input
join table t 
on   t.id=input.id
order by input.rnk

Answer 5

SELECT id,name from table WHERE id IN (23, 33, 55, 2) ORDER BY id = 23 DESC, id = 33 DESC, id = 55 DESC, id = 2 DESC不是特定于数据库的解决方案，但仍然有效