Can i force mysql to perform subquery first?

Question

I have query like this:

SELECT `table_1`.* from `table_1`
  INNER JOIN `table_2` [...]
  INNER JOIN `table_3` [...]
WHERE `table_1`.`id` IN(
  SELECT `id` FR         


        

Answer 1

Unfortunately, no, you cannot. Subqueries are actually run once for each row in the outer query.

I'd actually suggest that you convert this to another join, using table_1.id as your key to the other table.