name:: filtering binaries
query::
select * 
from (select * 
	from ppmxl.main 
	where 
		1=contains(point('ICRS', raj2000, dej2000), 
			circle('ICRS', 121, 12, 0.3))) as q
where not exists (
	select * from dmubin.main as d 
	where 
		1=contains(point('ICRS', d.raj2000, d.dej2000), 
			circle('ICRS',q.raj2000, q.dej2000, 0.001)))
description::This query demonstrates how to filter objects in one table
using another one; in this case, we filter objects with variable proper
motion (due to non-resolved duplicity) from a field of PPMXL.  Cf.
:taptable:`dmubin.main`, :taptable:`ppmxl.main`
..