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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