mysql - 如何订购此 UNION MySQL 查询？

Question

我有以下查询，想按 CREATED 列对结果进行排序，我该怎么做？

(SELECT media.id, media.accessKey, media.internalName, media.type, media.modified, users.username, users.id, media.created,
0 AS reposted
FROM media
LEFT JOIN users ON users.id = media.userId)
UNION
(SELECT media.id, media.accessKey, media.internalName, media.type, media.modified, users.username, reposts.userId, reposts.created,
1 AS reposted
FROM reposts
LEFT JOIN media ON media.id = reposts.mediaId
LEFT JOIN users ON users.id = reposts.userId)

Answer 1

添加：

order by created

在您的查询结束时。

Answer 2

您只需将 order by 子句添加到您的查询（查询(周围的使用不是强制性的）：

SELECT media.id,
       media.accessKey,
       media.internalName,
       media.type,
       media.modified,
       users.username,
       users.id,
       media.created,
       0 AS reposted
FROM media
LEFT JOIN users ON users.id = media.userId
UNION
SELECT media.id,
       media.accessKey,
       media.internalName,
       media.type,
       media.modified,
       users.username,
       reposts.userId,
       reposts.created,
       1 AS reposted
FROM reposts
LEFT JOIN media ON media.id = reposts.mediaId
LEFT JOIN users ON users.id = reposts.userId
ORDER BY CREATED ASC

您可以检查此sqlfiddle以查看它是否正常工作。