Re: [HACKERS] Table aliases in delete statements?

> >Don't use s1. Just refer to native deltest in the subquery. That
> >should reference the outer table.
>
> That doesn't seem to work as 3 rows are deleted and not just the
> two duplicates.
>
> emkxp01=> delete from deltest where respdate not in ( select min(s2.respdate)
> from deltest s2 where sessionid = s2.sessionid);
> DELETE 3
> emkxp01=> select * from deltest;
> sessionid | respdate
> -----------+------------------------------
> 1 | Tue 07 Dec 22:32:01 1999 GMT
> (1 row)

No. Use:

emkxp01=> delete from deltest where respdate not in ( select min(s2.respdate)
from deltest s2 where deltest.sessionid = s2.sessionid);
^^^^^^^

--
Bruce Momjian | http://www.op.net/~candle
maillist(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026