How to improve this MySQL Query using join?

Question

I have got a simple query and it takes more than 14 seconds.

select 
     e.title, e.date, v.name, v.city, v.region, v.country

from seminar e force index for jo         


        

Answer 1

I went another way since it seems that MySQL can't handle joins effectively:

• Created one big new table with all the columns I need from the join
• So the seminars and events are in one table now
• added indexes

Now the query is fast. Don't know why...

From 25 seconds, we are down to .08 seconds

That's how I wanted it.

If anybody still knows why, you are more than welcome to provide an answer.