Question

I have a simple SQL statement like the following and I would like to nest the aggregate functions SUM and MIN:

SELECT SUM(MIN(r1.price)) 
FROM rounds r1, rounds r2 
WHERE r1.round ='1' 
AND r1.market = r2.market 
AND r1.round = r2.round 
AND r1.name = r2.name 
GROUP BY market

Unfortunately, this doesn’t work.

Answer 1

Try:

SELECT SUM(lowest_price) FROM
(SELECT MIN(r1.price) AS lowest_price 
FROM rounds r1
INNER JOIN rounds r2 ON r1.market = r2.market
                    AND r1.round = r2.round 
                    AND r1.name = r2.name
WHERE r1.round ='1' 
GROUP BY r1.market) innerSElect