涉及的2張數據表:
orderitem表:
product表:
想得到的結果:
最後那張圖的SQL語句是
SELECT DISTINCT products.name, count(product_id) buynum FROM orderitem ,products WHERE orderitem.product_id=products.id GROUP BY product_id ORDER BY buynum DESC;
涉及的2張數據表:
orderitem表:
product表:
想得到的結果:
最後那張圖的SQL語句是
SELECT DISTINCT products.name, count(product_id) buynum FROM orderitem ,products WHERE orderitem.product_id=products.id GROUP BY product_id ORDER BY buynum DESC;