#1068
Easy Database Product sales analysis i
Database
85.6% acceptance
Feb 27, 2026
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Table: Sales
+-------------+-------+
| Column Name | Type |
+-------------+-------+
| sale_id | int |
| product_id | int |
| year | int |
| quantity | int |
| price | int |
+-------------+-------+
(sale_id, year) is the primary key (combination of columns with unique values) of this table.
product_id is a foreign key (reference column) to Product table.
Each row of this table shows a sale on the product product_id in a certain year.
Note that the price is per unit.
Table: Product
+--------------+---------+
| Column Name | Type |
+--------------+---------+
| product_id | int |
| product_name | varchar |
+--------------+---------+
product_id is the primary key (column with unique values) of this table.
Each row of this table indicates the product name of each product.
Write a solution to report the product_name, year, and price for each sale_id in the Sales table.
Return the resulting table in any order.
The result format is in the following example.
Solution
SQL
#
# Table: Sales
# +-------------+-------+
# | Column Name | Type |
# +-------------+-------+
# | sale_id | int |
# | product_id | int |
# | year | int |
# | quantity | int |
# | price | int |
# +-------------+-------+
# (sale_id, year) is the primary key (combination of columns with unique values) of this table.
# product_id is a foreign key (reference column) to Product table.
# Each row of this table shows a sale on the product product_id in a certain year.
# Note that the price is per unit.
# Table: Product
# +--------------+---------+
# | Column Name | Type |
# +--------------+---------+
# | product_id | int |
# | product_name | varchar |
# +--------------+---------+
# product_id is the primary key (column with unique values) of this table.
# Each row of this table indicates the product name of each product.
# Write a solution to report the product_name, year, and price for each sale_id in the Sales table.
# Return the resulting table in any order.
# The result format is in the following example.
# Example 1:
# Input:
# Sales table:
# +---------+------------+------+----------+-------+
# | sale_id | product_id | year | quantity | price |
# +---------+------------+------+----------+-------+
# | 1 | 100 | 2008 | 10 | 5000 |
# | 2 | 100 | 2009 | 12 | 5000 |
# | 7 | 200 | 2011 | 15 | 9000 |
# +---------+------------+------+----------+-------+
# Product table:
# +------------+--------------+
# | product_id | product_name |
# +------------+--------------+
# | 100 | Nokia |
# | 200 | Apple |
# | 300 | Samsung |
# +------------+--------------+
# Output:
# +--------------+-------+-------+
# | product_name | year | price |
# +--------------+-------+-------+
# | Nokia | 2008 | 5000 |
# | Nokia | 2009 | 5000 |
# | Apple | 2011 | 9000 |
# +--------------+-------+-------+
# Explanation:
# From sale_id = 1, we can conclude that Nokia was sold for 5000 in the year 2008.
# From sale_id = 2, we can conclude that Nokia was sold for 5000 in the year 2009.
# From sale_id = 7, we can conclude that Apple was sold for 9000 in the year 2011.
#
# Write your MySQL query statement below
SELECT p.product_name, s.year, s.price
FROM Sales s
JOIN Product p ON s.product_id = p.product_id;