Delete - I can't specify target table?

Question

Why this query doesn't work?

DELETE FROM recent_edits 
WHERE trackid NOT IN 
     (SELECT DISTINCT history.trackid 
     FROM history JOIN recent_edits ON history.trackid=recent_edits.trackid 
     GROUP BY recent_edits.trackid)

I get this message : "You can't specify target table "recent_edits" for update in FROM clause

score 133 · Accepted Answer · answered Apr 28 '11 at 10:04

133

Try in this way

DELETE FROM recent_edits 
WHERE trackid NOT IN 
     (select * from (SELECT DISTINCT history.trackid 
     FROM history JOIN recent_edits ON history.trackid=recent_edits.trackid 
     GROUP BY recent_edits.trackid) as t);

answered Apr 28 '11 at 10:04

Nicola Cossu

54,599
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92
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52

This needs an explanation. – nhaarman Aug 15 '16 at 14:13
@nhaarman a detailed explanation: https://www.xaprb.com/blog/2006/06/23/how-to-select-from-an-update-target-in-mysql – fall Jun 30 '21 at 03:29

Elysiumplain · Answer 2 · 2017-06-26T21:27:56.547

37

You can't post-process a table which is locked for deletion. using the hack select * from (query) as Nicola states will generate a temporary table instead of direct access.

Edit - make sure that you give ID to the tables you use since it is nested and will require uniqueID for every table.

edited Jun 26 '17 at 21:27

answered Jan 19 '17 at 22:00

Elysiumplain

711
8
21

Delete - I can't specify target table?

2 Answers2

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