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1068. Product Sales Analysis I

SQL 50 · Basic Joins (day 2). Decode it with the hints, solve it on LeetCode, then compare with the reference solution in MySQLPostgreSQL.

Your work

Status Notes Your solution (MySQLPostgreSQL)

Open one at a time. Try to finish with as few as you can.

1. What does one output row represent?

One sale.

2. Approach

INNER JOIN Product ON product_id.

3. The trap

No grouping; every sale is one output row.

Tested on MySQL 8.0 and PostgreSQL 16. Switch dialect at the top of the page.

Show the MySQLPostgreSQL solution

SELECT p.product_name, s.year, s.price
FROM Sales s
JOIN Product p ON s.product_id = p.product_id;