SELECT (a+b) as c FROM my_table ORDER BY c ASC;
How can I order by two columns sum in Mongo?
SELECT (a+b) as c FROM my_table ORDER BY c ASC; How can I order
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SELECT (a+b) as c FROM my_table ORDER BY c ASC;
How can I order by two columns sum in Mongo?
You can’t do it easy without an extra action.
To sort on any computed value you need to store it in a document first or in other worlds you need to create extra field ‘c’, and store a + b in it with each update/insert and only then sort on ‘c’ as usual.