Tricky multiple where condition MySQL Query - mysql

Question

I have a table customer, a table with different criterias (These criterias are then used to make ratings). Another table has the values and its keys in it.
table company
==============
int company_id
varchar name
bool status
table criteria
==============
int criteria_id
varchar name
bool status
table company_criteria
==============
int company_id
int criteria_id
int criteria_value
varchar comments
Now i display all the criterias in the form of select boxes which will have themselves a value against each criteria (already in the DB). Now i want the user to be able to search for different companies who have those specific criteria and the stored value.
e.g: table customer has a record with id 1
table criteria has records
1--->Reputation, 2--> Salary
table company_criteria has following records:
company_id | criteria_id | criteria_value |
============================================
1 1 10
1 2 20
Now the user sees two select boxes (remember there are two records in the criteria table) - with different options. He selects 10 from first select box and 20 from the second select box. How would i write the Query - I tried the following
SELECT DISTINCT `co`.*
FROM (`company` co)
JOIN `company_criteria` cc ON `co`.`company_id` = `cc`.`company_id`
WHERE (`cc`.`criteria_id`=1 AND `cc`.`criteria_value`>=10) AND (`cc`.`criteria_id`=2 AND `cc`.`criteria_value`>=20)
It just doesn't work - gives me no results - always. Appreciate any help - thanks.

Answer 1

Probably you want to put and OR instead of the AND here
SELECT DISTINCT `co`.*
FROM (`company` co)
JOIN `company_criteria` cc ON `co`.`company_id` = `cc`.`company_id`
WHERE (`cc`.`criteria_id`=1 AND `cc`.`criteria_value`>=10) OR (`cc`.`criteria_id`=2 AND `cc`.`criteria_value`>=20)
between the 2 where conditions....they both cant be true at the same time I think