refactor 1327

Author: fishercoder1534

database/_1327.sql

@@ -1,81 +1,3 @@
---1327. List the Products Ordered in a Period
---
---Table: Products
---
---+------------------+---------+
---| Column Name      | Type    |
---+------------------+---------+
---| product_id       | int     |
---| product_name     | varchar |
---| product_category | varchar |
---+------------------+---------+
---product_id is the primary key for this table.
---This table contains data about the company's products.
---Table: Orders
---
---+---------------+---------+
---| Column Name   | Type    |
---+---------------+---------+
---| product_id    | int     |
---| order_date    | date    |
---| unit          | int     |
---+---------------+---------+
---There is no primary key for this table. It may have duplicate rows.
---product_id is a foreign key to Products table.
---unit is the number of products ordered in order_date.
---
---
---Write an SQL query to get the names of products with greater than or equal to 100 units ordered in February 2020 and their amount.
---
---Return result table in any order.
---
---The query result format is in the following example:
---
---
---
---Products table:
---+-------------+-----------------------+------------------+
---| product_id  | product_name          | product_category |
---+-------------+-----------------------+------------------+
---| 1           | Leetcode Solutions    | Book             |
---| 2           | Jewels of Stringology | Book             |
---| 3           | HP                    | Laptop           |
---| 4           | Lenovo                | Laptop           |
---| 5           | Leetcode Kit          | T-shirt          |
---+-------------+-----------------------+------------------+
---
---Orders table:
---+--------------+--------------+----------+
---| product_id   | order_date   | unit     |
---+--------------+--------------+----------+
---| 1            | 2020-02-05   | 60       |
---| 1            | 2020-02-10   | 70       |
---| 2            | 2020-01-18   | 30       |
---| 2            | 2020-02-11   | 80       |
---| 3            | 2020-02-17   | 2        |
---| 3            | 2020-02-24   | 3        |
---| 4            | 2020-03-01   | 20       |
---| 4            | 2020-03-04   | 30       |
---| 4            | 2020-03-04   | 60       |
---| 5            | 2020-02-25   | 50       |
---| 5            | 2020-02-27   | 50       |
---| 5            | 2020-03-01   | 50       |
---+--------------+--------------+----------+
---
---Result table:
---+--------------------+---------+
---| product_name       | unit    |
---+--------------------+---------+
---| Leetcode Solutions | 130     |
---| Leetcode Kit       | 100     |
---+--------------------+---------+
---
---Products with product_id = 1 is ordered in February a total of (60 + 70) = 130.
---Products with product_id = 2 is ordered in February a total of 80.
---Products with product_id = 3 is ordered in February a total of (2 + 3) = 5.
---Products with product_id = 4 was not ordered in February 2020.
---Products with product_id = 5 is ordered in February a total of (50 + 50) = 100.
-
 --# Write your MySQL query statement below
 --credit: https://leetcode.com/problems/list-the-products-ordered-in-a-period/discuss/491314/MYSQL