mysql HAVING

SELECT colonne1, SUM(colonne2)
FROM nom_table
GROUP BY colonne1
HAVING fonction(colonne2) operateur valeur

SELECT 
    ordernumber,
    SUM(quantityOrdered) AS itemsCount,
    SUM(priceeach*quantityOrdered) AS total
FROM
    orderdetails
GROUP BY 
   ordernumber
HAVING 
   total > 1000;