How to have a custom sort order for a union query in Postgres

Question

With a query like this (simplified for clarity):

SELECT \'East\' AS name, *
FROM events 
WHERE event_timestamp BETWEEN \'2015-06-14 06:15:00\' AND \'2015-06-21 0         


        

Answer 1

By adding an extra column for ordering purpose, however it makes the UNION clause to work exactly as a UNION ALL (it does not eliminate duplicate rows from the result).