Question

I am having trouble figuring our how I can get results only when products.published, product_types.published, and product_cats.published = 1 but my query isn’t working. Please help:

SELECT 
  `products`.`title`,
  `products`.`menu_id`,
  `products`.`short_description`,
  `products`.`datasheet_icon`,
  `products`.`datasheet`,
  `products`.`ordering`,
  `products`.`product_type_id`,
  CASE WHEN CHAR_LENGTH(`products`.`alias`)
    THEN CONCAT_WS(':', `products`.`id`, `products`.`alias`) 
    ELSE `products`.`id` 
  END AS slug 
FROM 
  `products`, 
  `product_cats`,
  `product_types`
WHERE 
  `products`.published=1 AND
  `product_cats`.published=1 AND
  `product_types`.published=1 AND
  `products`.`product_cat_id`='42' AND
  `product_types`.`id` IN (1,40,48,49,50)
GROUP BY `products`.`id`
ORDER BY `product_types`.`ordering`, `products`.`ordering`

Answer 1

I want to assume tables product_cats and product_types have product ids in them as well. And I call them pid in this:

SELECT 
    p.title,
    p.menu_id,
    p.short_description,
    p.datasheet_icon,
    p.datasheet,
    p.ordering,
    p.product_type_id,
    CASE 
        WHEN CHAR_LENGTH(p.alias)
        THEN CONCAT_WS(':', p.id, p.alias) 
        ELSE p.id 
    END AS slug 
FROM products p
    JOIN product_cats pc ON pc.pid = p.id
    JOIN product_types pt ON pt.pid = p.id
WHERE 
    p.published=1 AND
    pc.published=1 AND
    pt.published=1
GROUP BY p.id
ORDER BY pt.ordering,p.ordering