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I think Coy has given the best solution for what was asked. I just
wanted to mention a couple of additional things.
1. If for whatever reason, you had wanted to NOT get rid of
duplicates, then you would use UNION ALL. Without the ALL, UNION is
the same thing as UNION DISTINCT.
2. The union of two sets is another set, and as such there is no
guarantee that the order of the rows will be preserved. (With SQL,
you're encouraged to think of rows as inherently unordered, and if you
need to impose an order, then you do so explicitly with ORDER BY. It
so happens Db2 does give you the RRN function if you absolutely need
it, but I think it should be avoided if at all possible.)
John Y.
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