SELECT p.name,DAYNAME(t.transaction_date) day,COUNT(t.id) transactions,SUM(tsl.quantity) units FROM products p JOIN transaction_sell_lines tsl ON p.id=tsl.product_id JOIN transactions t ON tsl.transaction_id=t.id WHERE t.type="sell" GROUP BY p.id,p.name,DAYNAME(t.transaction_date) ORDER BY units DESC;