MySQL: implementing Using GROUP BY and Aggregate Functions in Subquery for Daily Report Generation
After trying multiple solutions online, I still can't figure this out. I'm working with an scenario when trying to generate a daily sales report from my MySQL 8.0 database. I'm using a subquery to calculate the total sales per product for each day, but I'm getting unexpected results due to the way I'm handling the `GROUP BY` clause. When I run my query, I receive the behavior `behavior 1055 (42000): 'mydb.sales.product_id' isn't in GROUP BY`. Here's the query I've constructed: ```sql SELECT report.date, p.product_id, SUM(s.amount) AS total_sales FROM (SELECT DATE(order_date) AS date FROM orders WHERE order_date >= CURDATE() - INTERVAL 1 DAY GROUP BY DATE(order_date)) AS report JOIN sales s ON DATE(s.sale_date) = report.date JOIN products p ON s.product_id = p.id GROUP BY report.date; ``` I've tried adding `p.product_id` to the `GROUP BY` clause, but that throws the behavior: `behavior 1055 (42000): 'mydb.sales.date' isn't in GROUP BY`. The aggregation seems to be conflicting with the grouping. I also considered using `ANY_VALUE()` for the product ID, but I'm not sure if that's the right approach in this case. Moreover, my goal is to get a comprehensive report of total sales per product for each day without modifying my existing data structure. I need a clean and efficient solution for this. Has anyone encountered a similar scenario, or can someone suggest the correct way to structure this query to avoid these errors and produce the desired results? My development environment is Windows. I'd really appreciate any guidance on this. This issue appeared after updating to Sql LTS. This is my first time working with Sql stable.