I have three queries that I aggregate with a union. I'd like the
results from the first query placed before the second, and the second
before the third. I accomplished this by adding a number to the end of
the results for each query, and ordering by that column:

Select x,y,z,1
From query1
Union
Select x,y,z,2
From query2
Union
Select x,y,z,3
From query3
Order by 4

This worked, but duplicates are no longer surpressed. If I remove the
order by clause, will the results be ordered by their order around the
union predicates, or is it undetermined.?

Thanks, Rick DeBay