I'm never really sure if I'm posting in the right thread, but this seems to fit best. I'm trying to build a query that will email only customers that have purchased a particular product. I've seen similar questions where they target specific customer groups, but I've not found one to target a specific item purchased.

What I need then is a proper table to use (TABLE_ORDERS_PRODUCTS ?) and naturally a proper sql. What I have seems to be close, but the numbers don't quite add up. I've based this on the query for customers who have never purchased anything.
SELECT  DISTINCT c.customers_email_address as customers_email_address, c.customers_lastname as customers_lastname, c.customers_firstname as customers_firstname 
JOIN TABLE_ORDERS o ON o.orders_id=p.orders_id
JOIN TABLE_CUSTOMERS c ON c.customers_id=o.customers_id
WHERE products_id =3
I have to admit, it's been a while since I played with sql coding, so I'm a bit rusty.

Well, as I'm typing this, I realize the different in the count is "DISTINCT", it appears to be coming up fine now, so I'll leave this as something others may find useful.