I have this code:
Select firstname, lastname, sum(quantity) as quantitySum
FROM Customer
JOIN "Order"
ON Customer.id = "Order".customerid
JOIN orderitem
ON "Order".id = orderitem.orderid
WHERE country = 'Germany'
GROUP BY firstname, lastname
HAVING quantitySum > 500
ORDER BY lastname
But it gives me an error. I can not figure it out. Happy for every help!
Having
clause execute after group by
and then select
so you have to use aggregated function with having
as following
Select firstname, lastname, sum(quantity) as quantitySum
FROM Customer
JOIN "Order"
ON Customer.id = "Order".customerid
JOIN orderitem
ON "Order".id = orderitem.orderid
WHERE country = 'Germany'
GROUP BY firstname, lastname
HAVING sum(quantity) > 500
ORDER BY lastname
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