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Editorial Team
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Asked: 2026-05-23T20:50:36+00:00

Example: SELECT (SELECT SUM(…) FROM …) as turnover, (SELECT SUM(…) FROM …) as cost,

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Example:

SELECT
   (SELECT SUM(...) FROM ...) as turnover,
   (SELECT SUM(...) FROM ...) as cost,
   turnover - cost as profit

Sure this is invalid (at least in Postgres) but how to achieve the same in a query without rewriting the sub-query twice?

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1 Answer

  1. Editorial Team

    Like so:

    SELECT
   turnover,
   cost,
   turnover - cost as profit
from (
   (SELECT SUM(...) FROM ...) as turnover,
   (SELECT SUM(...) FROM ...) as cost
   ) as partial_sums
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