Question

Ok I’m a beginner at mysql, but I have been trying to create a query for many to many tables.

My curent structure is:

---

Products

• sku
• product_name
• price
• etc..

---

Categories

• id
• category

---

products_categories

• product_id (from sku column)
• category_id

---

How can I query the following:

• All products in a category
• All categories associated with a product

Answer 1

All products in a category

select p.product_name 
from products p
join product_categories pc
on p.sku = pc.product_id
join categories c
on c.id = pc.category_id
where c.category like '%CATEGORY_NAME_HERE%';

All categories associated with a product

select c.category
from category c
join product_categories pc
on c.category_id = pc.category_id
join product p
on p.sku = pc.product_id
where p.product_name like '%PRODUCT_NAME_HERE%';