I have a log file that captures data from various sensors every minute that
we use to draws graphs on our website.
The table looks like this:
CREATE TABLE `log` (
`id` int(14) NOT NULL auto_increment,
`VarName` varchar(255) NOT NULL,
`TimeString` datetime NOT NULL,
`VarValue` decimal(25,6
On 2012-07-07 9:52 AM, Cabbar Duzayak wrote:
Hmm,
Looking at the link http://www.artfulsoftware.com/infotree/queries.php
and explanations here, EXISTS() should have performed better, but does
not seem to??? I stopped it after about 5 minutes.
I tried both:
SELECT * FROM A WHERE EXISTS (SELE
Hmm,
Looking at the link http://www.artfulsoftware.com/infotree/queries.php
and explanations here, EXISTS() should have performed better, but does
not seem to??? I stopped it after about 5 minutes.
I tried both:
SELECT * FROM A WHERE EXISTS (SELECT * FROM B WHERE A.id=B.A_ID and
B.name like 'X
