Bit is integer data type not logical.

>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
>>>>

>>>>