How to ORDER BY a SUM() in MySQL?

Question

I have a table: \"ID name c_counts f_counts \"

and I want to order all the record by sum(c_counts+f_counts) but this doesn\'t work:

SELECT

Answer 1

This is how you do it

SELECT ID,NAME, (C_COUNTS+F_COUNTS) AS SUM_COUNTS 
FROM TABLE 
ORDER BY SUM_COUNTS LIMIT 20

The SUM function will add up all rows, so the order by clause is useless, instead you will have to use the group by clause.