TMA

SELECT SQL_CALC_FOUND_ROWS certifications.id
        , certifications.title
         , certifications.image
         , certifications.keywords
         , certifications.description
         , certifications.created_by
         , IF(customer_certifications.ordering > 0, customer_certifications.ordering, certifications.ordering) AS ordering
                -- , CONCAT_WS(' ', users.first_name, users.last_name) AS created_by
    FROM certifications
    LEFT JOIN customer_certifications ON(customer_certifications.certification_id = certifications.id )
    -- LEFT JOIN users ON(users.id = certifications.created_by)
    WHERE 1  AND certifications.id IN() GROUP BY certifications.id ORDER BY certifications.id DESC LIMIT 0, 3