2009/11/16 Amitabh Kant <amitabhk...@gmail.com>: > Hello > > I need to compare the bit values of a integer field in my table. For > example, I have a table called "t1" with just one field "a1" having > following values: > > a1 > == > 0 > 12 > 8 > 0 > 1 > 10 > 7 > 19 > > I am trying to fetch all records where the 3rd binary bit is 1, which from > the above example should be 12 (00001100) and 7 (00000111). If I convert the > values to binary and store it as string, I can easily compare them using > substr, but would rather like to retain the integer field. I have tried > using the get_bit function, but it seems my understanding of the function is > not correct. > > I would appreciate any help in this regard. > > > Amitabh >
There's probably a clean way of doing this, but you could do: SELECT a1 FROM t1 WHERE (a1::bit(10) & 4::bit(10))::int = 4; a1 ---- 12 7 (2 rows) Regards Thom -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
