On 28 October 2016 at 12:03, Alexander Farber <alexander.far...@gmail.com> wrote:
> is it please possible to rewrite the SQL query > > SELECT DISTINCT ON (uid) > uid, > female, > given, > photo, > place > FROM words_social > WHERE uid IN (SELECT player1 FROM games) > OR uid IN (SELECT player2 FROM games) > ORDER BY uid, stamp DESC > > where first column player1 is fetched in a subquery and then column > player2 is fetched from the same table? > You could use WHERE EXISTS (SELECT FROM games WHERE player1=uid OR player2=uid) although as Tom says, it's dubious whether that will result in a significant speedup. Geoff
