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1084. Sales Analysis III

Description

Table: Product

+--------------+---------+
| Column Name  | Type    |
+--------------+---------+
| product_id   | int     |
| product_name | varchar |
| unit_price   | int     |
+--------------+---------+
product_id is the primary key (column with unique values) of this table.
Each row of this table indicates the name and the price of each product.

Table: Sales

+-------------+---------+
| Column Name | Type    |
+-------------+---------+
| seller_id   | int     |
| product_id  | int     |
| buyer_id    | int     |
| sale_date   | date    |
| quantity    | int     |
| price       | int     |
+-------------+---------+
This table can have duplicate rows.
product_id is a foreign key (reference column) to the Product table.
Each row of this table contains some information about one sale.

 

Write a solution to report the products that were only sold in the first quarter of 2019. That is, between 2019-01-01 and 2019-03-31 inclusive.

Return the result table in any order.

The result format is in the following example.

 

Example 1:

Input: 
Product table:
+------------+--------------+------------+
| product_id | product_name | unit_price |
+------------+--------------+------------+
| 1          | S8           | 1000       |
| 2          | G4           | 800        |
| 3          | iPhone       | 1400       |
+------------+--------------+------------+
Sales table:
+-----------+------------+----------+------------+----------+-------+
| seller_id | product_id | buyer_id | sale_date  | quantity | price |
+-----------+------------+----------+------------+----------+-------+
| 1         | 1          | 1        | 2019-01-21 | 2        | 2000  |
| 1         | 2          | 2        | 2019-02-17 | 1        | 800   |
| 2         | 2          | 3        | 2019-06-02 | 1        | 800   |
| 3         | 3          | 4        | 2019-05-13 | 2        | 2800  |
+-----------+------------+----------+------------+----------+-------+
Output: 
+-------------+--------------+
| product_id  | product_name |
+-------------+--------------+
| 1           | S8           |
+-------------+--------------+
Explanation: 
The product with id 1 was only sold in the spring of 2019.
The product with id 2 was sold in the spring of 2019 but was also sold after the spring of 2019.
The product with id 3 was sold after spring 2019.
We return only product 1 as it is the product that was only sold in the spring of 2019.

Solutions

• SQL

• # Write your MySQL query statement below
  
  select Product.product_id, product_name
  from Product left join Sales
  on Product.product_id = Sales.product_id
  group by product_id
  having min(sale_date) >= '2019-01-01' and max(sale_date) <= '2019-03-31';
  
  --
  
  (
      SELECT DISTINCT s.product_id, p.product_name
      FROM Sales s LEFT JOIN Product p ON
          s.product_id = p.product_id
      WHERE s.sale_date >= '2019-01-01' AND
            s.sale_date <= '2019-03-31'
  )
  EXCEPT -- MINUS if Oracle
  (
      SELECT DISTINCT s.product_id, p.product_name
      FROM Sales s LEFT JOIN Product p ON
          s.product_id = p.product_id
      WHERE s.sale_date < '2019-01-01' OR
            s.sale_date > '2019-03-31'
  )
  
  --
  
  SELECT product_id, product_name
  FROM
      Sales
      JOIN Product USING (product_id)
  GROUP BY 1
  HAVING COUNT(1) = SUM(sale_date BETWEEN '2019-01-01' AND '2019-03-31');
  
  

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