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    <p>if you want to select matches won by <code>&lt;player1&gt;</code> or <code>&lt;player2&gt;</code>, you can use this query:</p> <pre><code>with cte_winners as ( select id, case when winner then player1 else player2 end as player from public.matches ) select * from cte_winners where player in (&lt;player1&gt;, &lt;player2&gt;) </code></pre> <p><strong>update</strong></p> <p>to get desired output your can use something like this:</p> <pre><code>with cte_winners as ( select case when winner then m.player1 else m.player2 end as player, count(*) as wins_v_opp, sum(count(*)) over() - count(*) as loses_v_opp from matches as m where player1 in (4200, 4201) and player2 in (4200, 4201) group by player ) select * from players as p left outer join cte_winners as cw on cw.player = p.id where p.id in (4200, 4201) </code></pre> <p><strong><kbd><a href="http://sqlfiddle.com/#!12/820e0/18" rel="nofollow">sql fiddle demo</a></kbd></strong></p> <p><strong>update2</strong></p> <pre><code>with cte_player as ( select p.id, p.name, p.wins, p.losses, p.rating from players as p where p.name in ('Sinku', 'Kenshiro') ), cte_winner as ( select case when winner then m.player1 else m.player2 end as player, count(*) as wins_v_opp, sum(count(*)) over() - count(*) as loses_v_opp from matches as m where m.player1 in (select p.id from cte_player as p) and m.player2 in (select p.id from cte_player as p) group by player ) select p.id, p.name, p.wins, p.losses, p.rating, m.wins_v_opp, m.loses_v_opp from cte_player as p left outer join cte_winner as m on m.player = p.id </code></pre> <p><strong><kbd><a href="http://sqlfiddle.com/#!12/820e0/21" rel="nofollow">sql fiddle demo</a></kbd></strong></p>
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    1. COI'll just update the original post :)
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    2. CO@OverlordQ your comment is not finished :)
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    3. CONow the $10,000 question is, what if I dont know the player IDs ahead of time and I wanted to select by name, wouldn't I need to join on players in the CTE?
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