Sorry, I'm not able to understand how I can use this solution!!!
can you better explain me your suggestion???
Thanks very much
Il giorno gio, 13/04/2006 alle 06.51 -0700, Richard Broersma Jr ha
scritto:
> Just a thought,
>
> Could you achieve that same result using the binary representation of an integer?
>
> Regards,
>
> Richard
>
> --- ivan marchesini <marchesini@unipg.it> wrote:
>
> > Dear users,
> > I have this problem
> >
> > I have a table where there are 20 columns named
> > vinc1, vinc2, vinc3, vinc4, etc....
> >
> > the values contained into each column are simply 1 or 0 (each column is
> > dichotomic)
> > 1 means presence
> > 0 means absence
> >
> > I would obtain a column (new_column) containg the name of the columns,
> > comma separated, where the value is = 1
> >
> > for example:
> >
> > vinc1 vinc2 vinc3 vinc4 new_column
> > 1 0 1 0 vinc1,vinc3
> > 0 0 0 1 vinc4
> > 0 1 1 1 vinc2,vinc3,vinc4
> >
> > can someone help me to find the best way to obtain this result???
> > thank you very much
> >
> > Ivan
> >
> >
> >
> >
> >
> >
> >
> > --
> > Ivan Marchesini
> > Department of Civil and Environmental Engineering
> > University of Perugia
> > Via G. Duranti 93/a
> > 06125
> > Perugia (Italy)
> > e-mail: marchesini@unipg.it
> > ivan.marchesini@gmail.com
> > tel: +39(0)755853760
> > fax: +39(0)755853756
> > jabber: geoivan73@jabber.org
> >
> >
> >
> >
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> >
>
>
--
Ivan Marchesini
Department of Civil and Environmental Engineering
University of Perugia
Via G. Duranti 93/a
06125
Perugia (Italy)
e-mail: marchesini@unipg.it ivan.marchesini@gmail.com
tel: +39(0)755853760
fax: +39(0)755853756
jabber: geoivan73@jabber.org
