On 7/12/07, Jerry Schwartz <[EMAIL PROTECTED]> wrote:
Since the "rows" is identical except for the last bit, where mine is 4 and yours is 2, does that mean yours is roughly more efficient by a 2:1 ratio?
For the most part, MySQL will do better with LEFT JOIN than an IN subquery. You can read all about the subquery optimization issues on Baron Schwartz's blog, xaprb.com. Here's one to get you started: http://www.xaprb.com/blog/2006/04/30/how-to-optimize-subqueries-and-joins-in-mysql/ - Perrin -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
