不允许SQL Update查询

Question

我想根据条件从表中选择一些id，然后更新它们。

 UPDATE user_feed
    SET `status` = 'DELETED'
    WHERE
        id IN (
            SELECT
                feed.id
            FROM
                user_activity act
            JOIN user_feed feed ON act.id = feed.activity_id
            WHERE
                act.uid = 16
            AND feed. STATUS = 'ACTIVE'
        )

显示此错误

  

[SQL] UPDATE user_feed set status =＆＃39; DELETED＆＃39;其中id IN（选择   来自user_activity的feed.id在act.id =上加入user_feed feed   feed.activity_id where act.uid = 16 and feed.status =＆＃39; ACTIVE＆＃39;）

     

[错误] 1093 - 您无法指定目标表＆＃39; user_feed＆＃39;用于更新   FROM子句

Answer 1

在MySQL中，您可以在join语句中使用update。我想这就是你想要的：

UPDATE user_feed f join
       user_activity a
       on a.id = f.activity_id and a.uid = 16 
    set f.`status` = 'DELETED'
    Where f.status = 'ACTIVE';