MySQL Solution for Product Sales Analysis III Problem
Intuition\n Describe your first thoughts on how to solve this problem. \nThe intuition behind the given solution is to retrieve the first year of sale for each 
# Intuition\n<!-- Describe your first thoughts on how to solve this problem. -->\nThe intuition behind the given solution is to retrieve the first year of sale for each product along with the corresponding quantity and price information from the Sales table. The approach involves using a subquery to identify the minimum year for each product and then filtering the Sales table based on the product_id and year values.\n\n# Approach\n<!-- Describe your approach to solving the problem. -->\n1. In the subquery, select the product_id and the minimum year for each product by grouping the Sales table by product_id and using the aggregate function min(year). Alias this column as "year".\n1. In the main query, select the product_id, year (aliased as "first_year"), quantity, and price columns from the Sales table.\n1. Add a filter condition to the main query to include only the rows where the product_id and year values match the results from the subquery.\n1. Return the resulting rows.\n\n# Complexity\n- Time complexity:\n<!-- Add your time complexity here, e.g. $$O(n)$$ -->\nThe time complexity of this solution depends on the size of the Sales table and the efficiency of the grouping and filtering operations. If the Sales table is properly indexed on the product_id and year columns, the subquery and filtering can be performed efficiently. The time complexity of the subquery and filtering can be estimated as O(n * log n), where n is the number of rows in the Sales table.\n\n- Space complexity:\n<!-- Add your space complexity here, e.g. $$O(n)$$ -->\nThe space complexity of this solution depends on the size of the resulting dataset, which includes the selected columns from the Sales table.\n\n# Code\n```\n# Write your MySQL query statement below\nselect product_id, year as first_year, quantity, price from Sales \nwhere (product_id, year) in (select product_id, min(year) as year from Sales group by product_id)\n```
['MySQL']