How to order not in stock items last - mysql

Question

I have the following MySQL query:
SELECT
*
FROM
product
INNER JOIN productcontent ON product.id = productcontent.productID
WHERE
product.deactivate <> '1'
AND productcontent.price > 0 { $level1SQL }
AND menulevel IN ($imploded)
OR menulevel = '$menulevelID' { $level1SQL }
ORDER BY
(
CASE
WHEN discountPrice < price
AND discountPrice > 0 THEN
CAST(
discountPrice AS DECIMAL (10, 2)
)
ELSE
CAST(
price AS DECIMAL (10, 2)
)
END
) { $price_order }
LIMIT { $limit }
but I also need to make sure that if the product.notInStock set to 1, it is being ordered at the very end (but still by name / price if such sorting is selected), is it even possible or should I just use 2 queries - one for products that are in stock and one for those that aren't ?

Answer 1

You can add an additional key to the ORDER BY:
SELECT *
FROM product p INNER JOIN
productcontent pc
ON p.id = pc.productID
WHERE p.deactivate <> '1' AND
pc.price > 0 {$level1SQL} AND
(menulevel IN ($imploded) OR menulevel = '$menulevelID')
{$level1SQL}
ORDER BY p.not_inStock DESC,
(case when discountPrice < price and discountPrice > 0
then CAST(discountPrice AS DECIMAL(10,2))
else CAST(price AS DECIMAL(10,2))
end) {$price_order}
LIMIT {$limit}
Also, the last condition on menulevel suggests that you need parentheses.