Note that you could always do something like:
WITH original_query AS (
SELECT DISTINCT ...
)
SELECT *
FROM original_query
ORDER BY lastname, firstname;
OR
SELECT * FROM ( SELECT DISTINCT ....
) sub_query
ORDER BY lastname, firstname
I am thinking you cannot alter the existing ORDER BY otherwise your use of
"DISTINCT ON" begins to mal-function. I dislike DISTINCT ON generally but
do not wish to ponder how you can avoid it, so I'd suggest just turning your
query into a sub-query like I show above.
David J.
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