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在MySQL中,有没有办法选择一条命令,让退行的开始和结束?
原标题:Is there a way in MySQL to choose an order for the beginning and end of rows returned?

看看这一简单问题

SELECT id FROM users

现在,我要说的是,有<代码>id的用户订购了4、5、7、8,然后我不关心<>middle,最后我想最后一点是55、56、58。

So the returned rows would be something like this ( a new row)

4  // explicitly chose these as the start rows
5  // " "
7  // " "
8  // " "
44 // these just come in any order (order not important)
23 // " "
10 // " "
55 // explicitly chose these as the end rows
56 // " "
58 // " "

我怎么能对上述问题做修改? 增 编

最佳回答

使用:

  SELECT u.id
    FROM USERS u
ORDER BY CASE id
           WHEN 4 THEN 1
           WHEN 5 THEN 2
           WHEN 7 THEN 3
           WHEN 8 THEN 4
           WHEN 55 THEN 100000
           WHEN 56 THEN 100001
           WHEN 58 THEN 100002
           ELSE id
         END ASC

把价值远远超出实际价值,最终达到55/56/58。

问题回答

最好在您的桌上引入一个秩序领域,而不是使用黑板或硬编码。





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