Question

I have about 1 million rows on users table and have columns A AA B BB C CC D DD E EE F FF by example to count int values 0 & 1

SELECT 
CityCode,SUM(A),SUM(B),SUM(C),SUM(D),SUM(E),SUM(F),SUM(AA),SUM(BB),SUM(CC),SUM(DD),SUM(EE),SUM(FF)
FROM users 
GROUP BY CityCode

Result 8 rows in set (24.49 sec).

How to make my statement more faster?

Answer 1

Use explain to to know the excution plan of your query.

Create atleast one or more Index. If possible make CityCode primary key.

Try this one

SELECT CityCode,SUM(A),SUM(B),SUM(C),SUM(D), SUM(E),SUM(F),SUM(AA),SUM(BB),SUM(CC),SUM(DD),SUM(EE),SUM(FF)
FROM users 
GROUP BY CityCode,A,B,C,D,E,F,AA,BB,CC,DD,EE,FF