So that's what you meant by integer field?

I'd take the bit over the integer for a flag field. For all intents and purposes it is a logical type. (just don't allow nulls)

>From BOL:
>
>bit
>Integer data type 1, 0, or NULL.
>
>
>>I would say the bit type is a logical data type in SQL Server. Only possible values of 0 or 1.
>>
>>>The datetime fields cannot be empty in SQL Server. Usually NULLs are used instead in which case IS NULL operator cabn be used.
>>>There're no logical data type in SQL Server. You can use any integer field instead.
>>>

IF someDateField IS NULL
>>>...
>>>IF someLogicalField = 0
>>>

>>>