Hi,
I don't quite know what you mean by a "bit string field" but for any
numeric, better integer row can use the following construct:
Say the bits you where testing where bit 3 ('00000100' bit),
and bit 6 ('00100000' bit) of say some_integer row....
then this would do it:
select
sum(case when (some_int & x'0004'::int)=0 then 0 else 1 end)
as count_of3thbit,
sum(case when (some_int & x'0020'::int)=0 then 0 else 1 end)
as count_of6thbit
from mytable ;
constant x'0004'::int = 4
constant x'0020'::int = 32
by best regards,
Stefan
Am Sonntag, 15. Juli 2007 21:35 schrieb Rajarshi Guha:
> Hi, is there a built in function that will give me the number of bits
> that are set to 1 in a bit string field?
>
> Thanks,
>
> -------------------------------------------------------------------
> Rajarshi Guha <rguha@xxxxxxxxxxx>
> GPG Fingerprint: 0CCA 8EE2 2EEB 25E2 AB04 06F7 1BB9 E634 9B87 56EE
> -------------------------------------------------------------------
> Without love intelligence is dangerous;
> without intelligence love is not enough.
> -- Ashley Montagu
--
email: stefan@xxxxxxxxxx
tel : +49 (0)6232-497631
http://www.yukonho.de
