Question

I need help with sql select from multiply tables.

Tables:

s_products
- id
- name
- url
- brand_id

s_products_categories
- product_id
- category_id

s_brands
- id
- name
- url

s_categories
- id
- name
- url

Compare:

s_products.id =  s_products_categories.product_id
s_categories.id = s_products_categories.category_id
s_products.brand_id = s_brands.id

And result needed:

1) $products['s_categories.url']['s_brands.url']['s_products.url'] = 's_products.name';

2) $brands['s_categories.url']['s_brands.url'] = 's_brands.name';

Can you help me to do it in one select (or more)?

Answer 1

Try:

select c.url  category_url,
       c.name category_name,
       b.url  brand_url,
       b.name brand_name,
       p.url  product_url,
       p.name product_name
from s_products p
join s_brands b on p.brand_id = b.id
join s_products_categories pc on p.id = pc.product_id
join s_categories c on pc.category_id = c.id

To see combinations of specific fields (eg. category_url with brand_url), add distinct immediately after select and remove the fields that aren’t required.