Have a products table with item_id and color_id. I'm trying to get the color_id with the most non-null instances.
This fails:
SELECT color_id
FROM products
WHERE item_id=1234
GROUP BY item_id
HAVING MAX(COUNT(color_id))
with
Invalid use of group function
This
SELECT color_id, COUNT(color_id)
FROM products
WHERE item_id=1234
GROUP BY item_id
Returns
color_id count
1, 323
2, 122
3, 554
I am looking for color_id 3, which has the most instances.
Is there a quick and easy way of getting what I want without 2 queries?
SELECT color_id AS id, COUNT(color_id) AS count
FROM products
WHERE item_id = 1234 AND color_id IS NOT NULL
GROUP BY color_id
ORDER BY count DESC
LIMIT 1;
This will give you the color_id and the count on that color_id ordered by the count from greatest to least. I think this is what you want.
for your edit...
SELECT color_id, COUNT(*) FROM products WHERE color_id = 3;