* Thus wrote bskolb ([EMAIL PROTECTED]): > I'm trying to optimize a query that in the first example is taking too long > to run. > > This is my existing working query: > $sql = "SELECT count(*) as cnt, id FROM `mYTable` WHERE c1 not in (1,16,36) > and c2 not in (1,16,36) and c3 not in (1,16,36) and c4 not in (1,16,36) and > c5 not in (1,16,36) GROUP BY id"; > > Is it possible to do something like this instead (This doesn't work of > course) > $sql = "SELECT count(*) as cnt, id FROM `myTable` WHERE (c1,c2,c3,c4,c5) > not in (1,16,36) GROUP BY id"; > > Any other suggestions are appreciated,
No matter what you do either a 'not in ()' or '<>', mysql is going to have to do a table scan for all the records. Curt -- "I used to think I was indecisive, but now I'm not so sure." -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
