Mysql compare sum of columns to columns in another table - mysql

Question

How can I select a row from another table based on the sum of column from the left table
SELECT Group_concat(c.cartid SEPARATOR ',') AS CartIDs,
Sum(c.grandtotal) AS Sum,
r.percentage
FROM carts c
LEFT JOIN rebates r
ON Sum(c.grandtotal) >= r.fromamountpurchased
AND Sum(c.grandtotal) <= r.toamountpurchased
WHERE c.ispaid = '1'
AND c.addedtorebates = '0'
GROUP BY c.customerid
But this doesn't work. I also tried HAVING also doesn't work.
Is it possible in one query?
Thanks!
UPDATE:
CREATE TABLE IF NOT EXISTS `carts` (
`CartID` bigint(20) NOT NULL AUTO_INCREMENT,
`CustomerID` bigint(20) NOT NULL,
`GrandTotal` decimal(10,2) NOT NULL,
`IsPaid` enum('0','1','2') NOT NULL,
`AddedToRebates` enum('0','1') NOT NULL,
PRIMARY KEY (`CartID`)
)
INSERT INTO `carts` (`CartID`, `CustomerID`, `GrandTotal`, `IsPaid`,
`AddedToRebates`, ) VALUES
(71, 28, '57450.00', '1', '0' ),
(73, 28, '57450.00', '1', '0');
CREATE TABLE IF NOT EXISTS `rebates` (
`RebateID` bigint(20) NOT NULL AUTO_INCREMENT,
`Percentage` varchar(255) NOT NULL COMMENT 'in %',
`FromAmountPurchased` decimal(10,2) NOT NULL,
`ToAmountPurchased` decimal(10,2) NOT NULL,
`CashEquivalent` decimal(10,2) NOT NULL,
PRIMARY KEY (`RebateID`)
)
INSERT INTO `rebates` (`RebateID`, `Percentage`, `FromAmountPurchased`,
`ToAmountPurchased`, `CashEquivalent`) VALUES
(1, '5', '50000.00', '69999.00', '3000.00'),
(2, '10', '70000.00', '79999.00', '5000.00'),
(3, '15', '80000.00', '89999.00', '6000.00'),
(4, '20', '90000.00', '99999.00', '7000.00'),
(5, '25', '100000.00', '150000.00', '8000.00'),
(6, '0', '0.00', '49999.00', '0.00');

Answer 1

Try this:
select q1.CartIDs, q1.total, r.percentage
from
(select group_concat(c.cartid) as CartIDs, sum(c.grandtotal) as total
from carts c
where c.ispaid = '1'
and c.addedtorebates = '0'
group by c.customerid ) q1
left join rebates r
on q1.total >= r.fromamountpurchased
and q1.total <= r.toamountpurchased
Here is a demo fiddle for you: http://sqlfiddle.com/#!9/d27f5/3
You cannot use aggregate functions like SUM() in the join predicate, so in this instance, a subquery is useful

Answer 2

You can achieve your result with a sub query. Please note that this sub query requires an additional scan of carts.
SELECT GROUP_CONCAT(c.CartID SEPARATOR ',') AS CartIDs, SUM(c.GrandTotal) as Sum, r.Percentage
FROM carts c
INNER JOIN (
SELECT SUM(GrandTotal) as grandTotal, CustomerID
FROM carts
GROUP BY CustomerID
) cSums ON cSums.CustomerID = c.CustomerID
LEFT JOIN rebates r ON cSums.grandTotal >= r.FromAmountPurchased AND cSums.grandTotal <= r.ToAmountPurchased
WHERE c.IsPaid = '1' AND c.AddedToRebates = '0' GROUP BY c.CustomerID