需要有关mysql查询的帮助

Question

我有一个试图合并以下表格的mysql查询：

TABLE: orders_products
products_id
orders_id
products_quantity
products_price

TABLE: products
products_id
products_model

我想要一个查询，它返回orders_products表中每个product_id的每个product_id和product_model的总销售数，总销售额。这是迄今为止我提出的最好的，它只是将所有内容添加到同一个桶中：

SELECT 
  SUM( op.products_quantity ) AS num_sold
  ,SUM( op.final_price * op.products_quantity ) 
  ,p.products_model
FROM orders_products AS op
JOIN products AS p
WHERE p.products_id = op.products_id

Answer 1

在group by p.products_id之后添加where，您就会很好

Answer 2

SELECT p.products_id, p.products_model,
  SUM( op.products_quantity ) AS num_sold
  ,SUM( op.final_price * op.products_quantity ) AS sales
FROM orders_products AS op
JOIN products AS p
WHERE p.products_id = op.products_id
GROUP BY p.products_id, p.products_model

Answer 3

您需要使用GROUP BY。请检查此链接：http://www.w3schools.com/sql/sql_groupby.asp