Question

could anyone help me build up a query based on the query bellow.

As you can see I have a product with specifications and certain groups which are build up in the front-end. I know the problem, 1 column can’t be 2 values at once but I need only those products that are in those 2 groups.

To illustrate, product_specification_sid, id 2 3 and 4 are sizes and de rest 8 ~ 11 are colors, so I would like to select a product that has 2 and 3.

Inner joining the table double isn’t an option since the groups (sizes, colors) may vary in the future.

SELECT
    products.*,
    categories.*,
    manufacturers.* 
FROM products
INNER JOIN  product_categories ON product_category_pid = product_id
INNER JOIN  categories ON product_category_cid = category_id
INNER JOIN  manufacturers ON product_manufacturer = manufacturer_id
INNER JOIN  product_specifications ON product_specification_pid=product_id
WHERE 
    product_active = 1  
AND 
(
    product_specification_sid in (3)  
AND  
    product_specification_sid in (8,9,6,7,10,11)  
) 
GROUP BY product_id

Answer 1

You can use a having clause instead.

SELECT
    products.*,
FROM products
INNER JOIN  product_categories ON product_category_pid = product_id
INNER JOIN  categories ON product_category_cid = category_id
INNER JOIN  manufacturers ON product_manufacturer = manufacturer_id
INNER JOIN  product_specifications ON product_specification_pid=product_id
WHERE product_active = 1  
GROUP BY product_id
HAVING COUNT(CASE WHEN product_specification_sid in (3) THEN 1 END) > 0
 AND COUNT(CASE WHEN product_specification_sid in (8,9,6,7,10,11) THEN 1 END) > 0