Re: Duplicate rows - Mailing list pgsql-sql
| From | Andreas Kretschmer |
|---|---|
| Subject | Re: Duplicate rows |
| Date | |
| Msg-id | 20100810194433.GA2021@tux Whole thread Raw |
| In response to | Duplicate rows ("Edward W. Rouse" <[email protected]>) |
| Responses | Re: Duplicate rows |
| List | pgsql-sql |
Edward W. Rouse <[email protected]> wrote: > Is there any way to remove a duplicate row from a table? Not my db but I have > to work with it. On version 7.4 right now. > How to select the right records? You can try to use the ctid-column, see my simple example: test=# select * from dups ;i ---1112234 (7 Zeilen) Zeit: 0,145 ms test=*# delete from dups where (ctid, i) not in (select max(ctid), i from dups group by i); DELETE 3 Zeit: 0,378 ms test=*# select * from dups ;i ---1234 (4 Zeilen) Andreas -- Really, I'm not out to destroy Microsoft. That will just be a completely unintentional side effect. (Linus Torvalds) "If I was god, I would recompile penguin with --enable-fly." (unknown) Kaufbach, Saxony, Germany, Europe. N 51.05082°, E 13.56889°