力扣高频SQL 50题（基础版）第三十九题

1327.列出指定时间段内所有的下单产品

题目说明

表: Products

±-----------------±--------+

| Column Name | Type |

±-----------------±--------+

| product_id | int |

| product_name | varchar |

| product_category | varchar |

±-----------------±--------+

product_id 是该表主键(具有唯一值的列)。

该表包含该公司产品的数据。

表: Orders

±--------------±--------+

| Column Name | Type |

±--------------±--------+

| product_id | int |

| order_date | date |

| unit | int |

±--------------±--------+

该表可能包含重复行。

product_id 是表单 Products 的外键（reference 列）。

unit 是在日期 order_date 内下单产品的数目。

写一个解决方案，要求获取在 2020 年 2 月份下单的数量不少于 100 的产品的名字和数目。

返回结果表单的 顺序无要求 。

实现过程

准备数据

Create table If Not Exists Products (product_id int, product_name varchar(40), product_category varchar(40))
Create table If Not Exists Orders (product_id int, order_date date, unit int)
Truncate table Products
insert into Products (product_id, product_name, product_category) values ('1', 'Leetcode Solutions', 'Book')
insert into Products (product_id, product_name, product_category) values ('2', 'Jewels of Stringology', 'Book')
insert into Products (product_id, product_name, product_category) values ('3', 'HP', 'Laptop')
insert into Products (product_id, product_name, product_category) values ('4', 'Lenovo', 'Laptop')
insert into Products (product_id, product_name, product_category) values ('5', 'Leetcode Kit', 'T-shirt')
Truncate table Orders
insert into Orders (product_id, order_date, unit) values ('1', '2020-02-05', '60')
insert into Orders (product_id, order_date, unit) values ('1', '2020-02-10', '70')
insert into Orders (product_id, order_date, unit) values ('2', '2020-01-18', '30')
insert into Orders (product_id, order_date, unit) values ('2', '2020-02-11', '80')
insert into Orders (product_id, order_date, unit) values ('3', '2020-02-17', '2')
insert into Orders (product_id, order_date, unit) values ('3', '2020-02-24', '3')
insert into Orders (product_id, order_date, unit) values ('4', '2020-03-01', '20')
insert into Orders (product_id, order_date, unit) values ('4', '2020-03-04', '30')
insert into Orders (product_id, order_date, unit) values ('4', '2020-03-04', '60')
insert into Orders (product_id, order_date, unit) values ('5', '2020-02-25', '50')
insert into Orders (product_id, order_date, unit) values ('5', '2020-02-27', '50')
insert into Orders (product_id, order_date, unit) values ('5', '2020-03-01', '50')

实现方式

with t1 as(select p.product_name,
       sum(o.unit) over(partition by o.product_id) as unit
from orders o join products p on o.product_id=p.product_id where o.order_date between '2020-02-01' and '2020-02-29')
select distinct product_name,unit from t1 where unit>=100;

结果截图