Question

I have the script:

SELECT *, (pbct_hits + (COUNT(likes.rvw_usr_like) * 5) - (COUNT(unlikes.rvw_usr_like)) * 5) AS score
FROM tb_publications
LEFT JOIN tb_reviews_users likes ON likes.rvw_usr_fk_publication = pbct_id AND likes.rvw_usr_like IS TRUE
LEFT JOIN tb_reviews_users unlikes ON unlikes.rvw_usr_fk_publication = pbct_id AND unlikes.rvw_usr_like IS FALSE
GROUP BY pbct_id
ORDER BY score DESC;

I would not want to make two joins to the same table.

I believe it is possible to optimize the above script, but I’m not getting.

Edit

The question is solved:

-- Final Script:
SELECT pbct.*
FROM tb_publications pbct
LEFT JOIN tb_reviews_users ON rvw_usr_fk_publication = pbct_id
GROUP BY pbct_id
ORDER BY
(
(pbct_hits * 1) +
((SUM(CASE WHEN rvw_usr_like IS TRUE THEN 1 ELSE 0 END)) * 5) -
((SUM(CASE WHEN rvw_usr_like IS FALSE THEN 1 ELSE 0 END)) * 5)
) DESC, pbct_record ASC;

Is based on answer of @MikeSmithDev.

Answer 1

What about

SELECT pbct_id, 
score = 
  (pbct_hits + 
     ((SUM(CASE WHEN rvw_usr_like IS TRUE THEN 1 ELSE 0 END)) * 5) -
     ((SUM(CASE WHEN rvw_usr_like IS FALSE THEN 1 ELSE 0 END)) * 5))
    FROM tb_publications
    LEFT JOIN tb_reviews_users likes ON likes.rvw_usr_fk_publication = pbct_id 
    GROUP BY pbct_id

That should work… or do something simpler in SQL with math on php side