MySQL query using EXISTS clause with subqueries scenarios to return expected records
I'm following best practices but I'm having trouble with a MySQL query that should return users who have made at least one order in the last month. I thought I could use the `EXISTS` clause to check for orders, but it seems like my query is returning more records than expected. Here's the query I'm using: ```sql SELECT u.id, u.name FROM users u WHERE EXISTS ( SELECT 1 FROM orders o WHERE o.user_id = u.id AND o.order_date >= NOW() - INTERVAL 1 MONTH ); ``` I expected this to return only users who placed orders in the last month, but it's returning all users instead. I also tried using `IN` instead of `EXISTS`, but I ended up with the same result. Here’s the modified query: ```sql SELECT u.id, u.name FROM users u WHERE u.id IN ( SELECT o.user_id FROM orders o WHERE o.order_date >= NOW() - INTERVAL 1 MONTH ); ``` I checked the `orders` table, and there are definitely users who haven't ordered anything in that time frame. My MySQL version is 8.0.23, and I'm also considering that perhaps there's an scenario with how I'm handling dates. Any insights on why I'm getting these unexpected results? Are there any nuances with `EXISTS` that I might be missing, or should I be looking at how the data is structured?