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Editorial Team
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Asked: 2026-06-03T13:47:29+00:00

Trying to sum multiple sums from different tables with different where conditions for each

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Trying to sum multiple sums from different tables with different where conditions for each table.

Here’s my 3 sums:

SELECT SUM(1column2) FROM table1 WHERE 1column1 = '0';
SELECT SUM(1column4) FROM table1 WHERE 1column3 = '0';
SELECT SUM(2column2) FROM table2 WHERE 2column1 = '0' AND 2column3 = 'w' AND 2column4 != 'f';

The result needs to be (first sum) - (second sum) - (third sum).

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1 Answer

  1. Editorial Team

    MySQL supports basic operators, so you should be able to do something as simple as:

    SELECT (SELECT SUM(1column2) FROM table1 WHERE 1column1 = '0') - (SELECT SUM(1column4) FROM table1 WHERE 1column3 = '0') - (SELECT SUM(2column2) FROM table2 WHERE 2column1 = '0' AND 2column3 = 'w' AND 2column4 != 'f');

    I’m sure this can be optimized, but that should give you what you need (and without better information on the relationships, optimization would be difficult).

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