Question

I have a problem with MySQL at this moment.
I’m trying to determine the highest float value from my table like this:

SELECT `id` 
FROM `LOTRESULTS` 
WHERE 
  `value`= (SELECT MAX(value) FROM `LOTRESULTS`) AND 
  `lot_id` = 180 
ORDER BY `id` DESC 
LIMIT 1

This works whenever I choose let’s say id 180, but none of the other combinations work.

There are 3 entries with 180 as lot_id, and 2 occurences with 179 as lot_id, etc.
It just works randomly, it fails on most of the entries in the DB.

Am I doing something wrong? Should I change the datatype of the value column?

Thanks in advance guys!

p.s. I’ve also tried:

SELECT `id` FROM `LOTRESULTS` WHERE `value`= (SELECT MAX(value) FROM
`LOTRESULTS`) AND `lot_id` = 180

and

SELECT `id` FROM `LOTRESULTS` WHERE `value`= (SELECT MAX(value) AS
`value` FROM `LOTRESULTS`) AND `lot_id` = 180

with the same results…

Answer 1

You don’t really have to use sub-query, or JOIN,
a simple where + order + limit will do :-

SELECT id FROM LOTRESULTS WHERE lot_id = 180 ORDER BY value DESC LIMIT 1;