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  • Dustin Waybright thinks this is interesting:

grp_id      shipcountry     shipregion      shipcity        numorders
----------- --------------- --------------- --------------- -----------
0           Argentina       NULL            Buenos Aires    16
1           Argentina       NULL            NULL            16
3           Argentina       NULL            NULL            16
...
0           USA             AK              Anchorage       10
1           USA             AK              NULL            10
0           USA             CA              San Francisco   4
1           USA             CA              NULL            4
0           USA             ID              Boise           31
1           USA             ID              NULL            31
......
            
        
			

From

Cover of Training Kit (Exam 70-461): Querying Microsoft® SQL Server® 2012

Note

Elements with a bit of 0 are part of the set.