Hello,
I have a query as follows:
SELECT products.*, avg(ratings.rating) AS rating
FROM products, ratings
WHERE products.ref = ratings.product_ref
GROUP BY products.ref
ORDER BY rating
In one sense this query works fine - it adds a new column called 'rating'
(which is a dynamically calculated average of ratings given to a certain
product) to my product results. My problem is that it only works if a rating
has been given for a product. When a new product is added, it will have no
ratings, and so it will not be returned in any of my queries.
Is there any way to assign a default value to the 'rating' column if actual
row(s) do not exist in the ratings table? I dont really want to have to make
a dummy rating row just to trick it into working.
Am i making sense? I hope so ;o)
Jamie Burns.
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