> /* This table has 5000 rows */
> CREATE TABLE files (
> id int(11) NOT NULL auto_increment,
> dir_id int(11) NOT NULL default '0',
> name varchar(100) NOT NULL default '',
> date datetime default NULL,
> PRIMARY KEY (id),
> KEY date (date)
> ) TYPE=MyISAM;
>
> for grins and giggles, add:
> key dir_id(dir_id),
> to the above.
That didn't change anything in this query (same query time, same EXPLAIN
output):
SELECT files.id, dirs.name FROM files
LEFT JOIN dirs ON files.dir_id=dirs.id
ORDER BY files.date DESC LIMIT 1;
But it actually made this query slower -- 0.07 sec instead of 0.03!
SELECT files.id, dirs.name FROM files, dirs where files.dir_id=dirs.id
ORDER BY files.date DESC LIMIT 1;
Jordan Russell
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