Question

It may be difficult to explain what I am after, apologies if the question is vague.

I have a table which associates products with keywords using IDs

So I may have product IDs, 2,3,4,5 associated with Keyword id 14
and product IDs 3,6,9 associated with Keyword id 15

My question is How do I count and store the total for those IDs associated with Keyword 14 and for those IDs associated with Keyword 15 and so on (New Keywords added all the time)?

MY SQL so far:

select products_keyword_categories.key_cat_name 
from products_keyword_to_product 
inner join products_keyword_categories 
on products_keyword_categories.key_cat_id = products_keyword_to_product.key_cat_id 
group by products_keyword_categories.key_cat_name

Many thanks in advance for any advice. Also, if there is any terminology that will aid me in further research via a Google search that would also be most welcome.

Edit to add: In the example above the table containing the associations is products_keyword_to_product – I inner join the other table to return the Keyword name.

Edit to add (2): Sorry I was afraid my question would be vague.
If I wanted to just count all the products using keyword ID 14 I would use COUNT() AS – As mentioned in the answers but I also need to count the number of products using Keyword ID 15 and Keyword ID 16 etc. – Hope that makes more sense.

Answer 1

select key_cat_name ,count(*) 
from products_keyword_categories pkc 
    inner join products_keyword_to_product ptk on pkc.id=ptk.key_id 
group by id;