MIN aggregate function to a BIT field

Transact-SQL
7

Not sure about that. They're not (typically) used to count things. More useful might be AND() OR() XOR() aggregates, but that's just dreamland.

You can simulate AND() like this

1 = ALL(Select bit_col from table)

and OR() like this:

1 = ANY(Select bit_col from table)

XOR() is a bit harder.