Left JOIN faster or Inner Join faster?

Question

So... which one is faster (NULl value is not an issue), and are indexed.

SELECT * FROM A
  JOIN B b ON b.id = a.id
  JOIN C c ON c.id = b.id 
 WHERE A.id = \         


        

Answer 1

LEFT JOIN shows all data from A and only shows data from B/C only if the condition is true. As for INNER JOIN, it has to do some extra checking on both tables. So, I guess that explains why LEFT JOIN is faster.