Question

I have the following query:

select * 
 from products as p
 left join files as f on f.contentid = p.productid
   where 
     p.state = 'active' AND 
     p.price > 0 order by p.created DESC 
   LIMIT 2200

Currently, this query takes about 1.7 seconds for 2200 rows. What I don’t understand is, why does this time not decrease when I change the limit from 2200 to 10, and more importantly, what I can do to speed it up?

Answer 1

Try :

EXPLAIN select * 
 from products p
 left join files f on f.contentid = p.productid
   where 
     p.state = 'active' AND 
     p.price > 0 order by p.created DESC 
   LIMIT 2200

to see what indexes you need