You can't specify target table for update in FROM clause

Question

I have a simple mysql table:

CREATE TABLE IF NOT EXISTS `pers` (
  `persID` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(35) NOT NULL,
  `gehalt` int(11         


        

Answer 1

The Approach posted by BlueRaja is slow I modified it as I was using to delete duplicates from the table. In case it helps anyone with large tables Original Query

delete from table where id not in (select min(id) from table group by field 2)

This is taking more time:

DELETE FROM table where ID NOT IN(
  SELECT MIN(t.Id) from (select Id,field2 from table) AS t GROUP BY field2)

Faster Solution

DELETE FROM table where ID NOT IN(
   SELECT x.Id from (SELECT MIN(Id) as Id from table GROUP BY field2) AS t)