Question

Can you pass variables into subqueries, like so?

SELECT users.id AS id, 
(SELECT SUM(total) FROM (image_totals) WHERE `cat_id` IN ('5', '3') AND `user_id` =id) AS image_count

This is only part of a larger query, all being generated through Active Record, but the key issue remains, the ‘id’ variable, how can I pass this into my subquery? Am I looking at this all wrong?

Thanks in advance. And let me know if you need more info.

Answer 1

Use GROUP BY. You want SUM(total) for each user.id for particular values of cat_id. I don’t know what the rest of your query looks like, but for what was shown, you can just:

SELECT
        users.id AS id,
        SUM(total)
FROM image_totals
WHERE cat_id IN ('5', '3')
GROUP BY users.id