如何计算 MYSQL 中按年分组的订单统计？

Question

订单table.

id	created_date	price
1	2021-09-01	100
2	2021-09-01	50
3	2020-09-01	50
4	2020-09-01	150
5	2019-09-01	100

订单详情table:-

id	order_id	product_quantity
1	1	10
2	2	20
3	1	30
4	3	10
5	3	20
6	4	30
7	5	20

所以我需要一个 MySQL 查询来获取有关每年的订单数量、价格和产品数量的统计信息。
预期的 table

year(created_date)	orders_count	product_quantity_in_orders	price
2021	2	60	150
2020	2	60	150
2019	1	20	100

Answer 1

请试试这个。

SELECT YEAR(o.created_date) year_created
     , COUNT(o.id) orders_count
     , SUM(t.product_quantity) product_quantity_in_orders
     , SUM(o.price) price 
FROM orders o
INNER JOIN (SELECT order_id
                 , SUM(product_quantity) product_quantity
            FROM order_details
            GROUP BY order_id) t
        ON o.id = t.order_id
GROUP BY YEAR(o.created_date)

如何计算 MYSQL 中按年分组的订单统计？

How to calculate Statistics for orders group by year in MYSQL?

java

mysql

spring

querydsl