(Ignore the "magic number" 8 for the business_category...that's just a test)Code SQL:
SELECT campaigns.id AS campaign_id, users_sponsors.id AS sponsor_id, IF(campaigns.promotedUntil IS NULL, 0, IF(campaigns.promotedUntil > CURDATE(), 1, 0)) AS promotedRanking, IF(campaigns.promotedUntil IS NULL, campaigns.max_cost_per_lead, 0) AS priceRank FROM `campaigns` RIGHT OUTER JOIN users_sponsors ON campaigns.uid = users_sponsors.id WHERE users_sponsors.business_category = 8 AND campaigns.paid = 1 AND EXISTS ( SELECT credit_cards.id FROM `credit_cards`, `users_sponsors` WHERE credit_cards.suid = users_sponsors.id AND users_sponsors.id = sponsor_id AND `authorized` != '0000-00-00 00:00:00' LIMIT 1 ) ORDER BY promotedRanking DESC, priceRank DESC, campaigns.date_added DESC LIMIT 5
The fact that I've been able to get myself to create a query this complex is really surprising to me. I'm trying to gather sponsor campaigns from the database with certain conditions. First of all, if they've been manually "promoted," they need to appear at the top of the list. I also need to check if the campaign's sponsor's user account has a valid (authorized) credit card on file. As you can see in the subquery, I tried to use the "sponsor_id" from the main query, but that returns an error. I don't know of another way to do what I want, and hopefully someone here understands what I'm trying to do and has more knowledge than I do of subqueries, unions, groups, joins, etc... because my experience is minimal.
I've also attached an sql file with each table's structure.
Any help is appreciated! Thank you!