MySQL Solution for Sales Analysis III Problem
Intuition\n Describe your first thoughts on how to solve this problem. \nThe intuition behind the given solution is to select the product_id and product_name of
# Intuition\n<!-- Describe your first thoughts on how to solve this problem. -->\nThe intuition behind the given solution is to select the product_id and product_name of products that had sales between a specific date range and had sales overall. The approach involves performing an inner join between the Sales table and the Product table using the product_id column. The results are then grouped by product_id. The HAVING clause is used to compare the sum of sales within the specific date range with the overall sum of sales.\n\n# Approach\n<!-- Describe your approach to solving the problem. -->\n1. Perform an inner join between the Sales table and the Product table using the product_id column.\n1. Group the results by product_id.\n1. Use the HAVING clause to filter the grouped results based on the comparison of the sum of sales within the date range and the overall sum of sales.\n1. Return the product_id and product_name columns of the selected products.\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, the indexing of the relevant columns, and the efficiency of the join and grouping operations. If the tables are properly indexed on the product_id and sale_date columns, and the date range filter can be efficiently applied, the time complexity 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 product_id and product_name columns.\n\n# Code\n```\n# Write your MySQL query statement below\n  select product_id, product_name from Sales\n  inner join product using(product_id)\n  group by product_id\n  having sum(if(sale_date between \'2019-01-01\' and \'2019-03-31\', 1, 0)) = sum(if(sale_date, 1, 0))\n```
['MySQL']