Question

I’ve got a table for helping choose products.

I would like to have a query where I got back every record where:

category_id = 'M10' and band_id = '010'
OR
category_id = 'M10' and band_id = '020'

AND

category_id = 'M50' and band_id = '010'
OR
category_id = 'M50' and band_id = '020'

My query:

SELECT 
product.entry_id AS entry_id, 
helpme.item_id AS product_id 
FROM inbound_help_me_choose helpme 
LEFT JOIN exp_channel_titles product ON (product.product_id = helpme.item_id) 
WHERE 
helpme.submarket_id = 'NZ' 
AND 
(
(helpme.category_id = 'M10' AND helpme.band_id = '010') 
OR 
(helpme.category_id = 'M10' AND helpme.band_id = '020')
)

works fine on the first category, but as soon I’m adding new WHERE conditions are failing:

SELECT 
product.entry_id AS entry_id, 
helpme.item_id AS product_id 
FROM inbound_help_me_choose helpme 
LEFT JOIN exp_channel_titles product ON (product.product_id = helpme.item_id) 
WHERE 
helpme.submarket_id = 'NZ' 
AND 
(
(helpme.category_id = 'M10' AND helpme.band_id = '010') 
OR 
(helpme.category_id = 'M10' AND helpme.band_id = '020')
)
AND
(
(helpme.category_id = 'M50' AND helpme.band_id = '010')
OR 
(helpme.category_id = 'M50' AND helpme.band_id = '020')
OR 
(helpme.category_id = 'M50' AND helpme.band_id = '030')
)

It seems OK for me, so I completely lost why it’s not working.

Answer 1

I think you need this

SELECT 
product.entry_id AS entry_id, 
helpme.item_id AS product_id 
FROM inbound_help_me_choose helpme 
LEFT JOIN exp_channel_titles product ON (product.product_id = helpme.item_id) 
WHERE 
helpme.submarket_id = 'NZ' 
AND 
(
   (helpme.category_id = 'M10' AND helpme.band_id IN ('010','020')) OR 
   (helpme.category_id = 'M50' AND helpme.band_id IN ('010','020','030'))
)