Mysql按值排序

我有一张桌子：

帖子：id |作者|内容

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我需要用一个查询从这个表中选择所有条目，但是作者演示写的文章必须放在第一位。

如果你想把作者字段放在第一位，那么你必须先写

select author, id, content FROM posts ORDER BY author

否则

select * FROM posts order by author

如果您想在此处订购其他人，请使用另一个示例：

 _______________________________________________________________________________
|                                                                               |
|                                                                               |
|      SELECT * FROM post ORDER BY                                              |
|       CASE                                                                    |
|       WHEN author = 'demo' THEN post1                                         |
|       WHEN author = 'sdvg' THEN id                                            |
|       END DESC                                                                |
|                                                                               |
|_______________________________________________________________________________|

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我会使用一个并集，并使用预定义的值进行排序。 先按演示选择所有帖子，然后按演示选择非演示帖子

SELECT id, author, content, 1 AS special FROM posts WHERE author='demo'
UNION
SELECT id, author, content, 0 AS special FROM posts WHERE author<>'demo'
ORDER BY special DESC

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@MindaugasJakubauskas我添加了一个演示并编辑了我的答案，以及其他示例，如果您想订购更多，则单击author=demo

SELECT id, author, content, 1 AS special FROM posts WHERE author='demo'
UNION
SELECT id, author, content, 0 AS special FROM posts WHERE author<>'demo'
ORDER BY special DESC