Showing posts with label efficiency. Show all posts
Showing posts with label efficiency. Show all posts

Sunday, March 11, 2012

Does JOIN order effect efficiency?

Hi all,

Does JOIN order effect efficiency?

If I have three large tables to join together should I join the two that I know will cut the number of rows down a lot first and then join the 3rd table or does it make no difference (if I join the first and 3rd - which I know will be a large result set and then join the 2nd).

Thanks in advance,

Chiz.it should make no difference. have a look at the query plan to be sure.