Query problem - Mailing list pgsql-sql

Hi,  I have table "user".

table "user"

id      bit(dec)    bit(bin) 
-----------------------------1       1             12       3            11 3       12         1100


and I need query  - > 

SELECT "output" FROM user WHERE id = 1 OR id = 2  or id = 3 
output = (1111) 

In programing language output = 

id(1..3) { $output = ( bit | $output );     
}

How write query ? . Thanks 





-- 
Rado Petrik <r.p@szm.sk>