I don\'t want to touch-off a religious war here, but there seem to be two schools of thoughts in how to represent boolean values in a database. Some say bit is
We build all our tables with an int "vector" field. We then use that field as a collection of 32 bits that we can assign for any purpose. (Potentially using a group of bits for a set of states). Avoids us having to keep adding in flag fields if we forget.