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I have a table of FinishedGames with columns: category and a score. I need to know how many games by category finished with more than certain score, but I don't understand the count if structure in PostgreSQL.

select category, count(score) as rounds, count(if score > 7) as wins
from "FinishedGames" group by category;

Does anyone knows how to do this in PostgreSQL?

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  • we can use, having <condition> part. Commented Sep 24, 2021 at 11:10

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you should use the CASE clause within the count function. e.g. COUNT(CASE WHEN score > 7 THEN 1 ELSE NULL END) (or SUM with 1 and 0 - same result...)

Regards, Jony

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It works with count or sum. Thank you.

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