このようなことをすることは可能ですか?
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`
特に、除算結果の値にwhere条件を付けたいと思います