SQL - WHERE Condition on SUM()

Question

Is it possible to do something like this:

SELECT 
  `e`.*, 
  `rt`.`review_id`, 
  (SUM(vt.percent) / COUNT(vt.percent)) AS rating 
FROM `catalog_product_ent         


        

Answer 1

Use HAVING for aggregate conditions (such as the one you have)

SELECT `e`.*, `rt`.`review_id`, (SUM(vt.percent) / COUNT(vt.percent)) AS rating 
FROM `catalog_product_entity` AS `e` 
INNER JOIN `rating_option_vote` AS `vt`
    ON vt.review_id = e.review_id 
WHERE ( rating >= '0') 
GROUP BY `vt`.`review_id'
HAVING (SUM(vt.percent) / COUNT(vt.percent)) > 0