Is there a benefit to a combined index on a table? Or is multiple single column indexes better?
If I have table 'foo' with columns a, b, and c. I will have a query like: select c from foo where a in (1,2,3) and b < 12345; Is index on a,b better in any way than an a index and a b index? An explain with one index sees it but doesn't use it (only the where) and having 2 indexes sees both and uses the one on b. Am I right to think that 2 indexes are better than one combined one? thx, Bryancan -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=arch...@jab.org
