Re: deleting an identical record

On Thu, 2002-02-21 at 09:25, Jean-Luc Lachance wrote:
> Oliver Elphick wrote:
> > > create table t (a int, b text);
> > >
> > > insert into t values (1, 'a');
> > > insert into t values (1, 'a');
> > > insert into t values (1, 'a');
> > > insert into t values (1, 'a');
> > >
> > > select oid, * from t;
> >
> > Aren't the oids different?
> >
> > DELETE FROM t WHERE oid <> xxx
> >
>  OUCH !!! There will be only one row left in the table.  Be carefull.

True.  But in my defence, that is valid in the context of this
particular example.  (Nevertheless, I was right only by accident and
your warning is very necessary.)

--
Oliver Elphick                                Oliver.Elphick@lfix.co.uk
Isle of Wight                              http://www.lfix.co.uk/oliver
GPG: 1024D/3E1D0C1C: CA12 09E0 E8D5 8870 5839  932A 614D 4C34 3E1D 0C1C

     "My sheep hear my voice, and I know them, and they
      follow me; And I give unto them eternal life; and they
      shall never perish, neither shall any man pluck them
      out of my hand."          John 10:27,28