SQLite: advanced patterns when using LEFT JOIN with NULL values in WHERE clause
Does anyone know how to I'm relatively new to this, so bear with me. I'm currently working with a question with my SQLite query where I use a `LEFT JOIN` and it seems that the NULL values in the joined table are not being handled as I expect. I'm trying to retrieve users along with their last orders, but when a user has no orders, I want to see NULL for the order details. However, it seems that my `WHERE` clause is filtering out these users entirely. Here's the query I'm using: ```sql SELECT u.id, u.name, o.order_date FROM users u LEFT JOIN orders o ON u.id = o.user_id WHERE o.order_date > '2023-01-01'; ``` With this query, I expect to see all users, including those who have no orders, along with their order dates if applicable. However, I'm only getting users who have an order date after January 1, 2023, despite the `LEFT JOIN`. To troubleshoot, I also tried changing the `WHERE` clause to: ```sql WHERE o.order_date IS NULL OR o.order_date > '2023-01-01'; ``` This did return users without orders, but it also returned rows where the order date was after the given date, which is not what I want. I simply want to include users with NULL orders without filtering by the order date. I’ve also checked the data to ensure that there are indeed users without orders. Could anyone guide to understand how to properly structure this query so that it achieves the desired result? Am I misunderstanding how `LEFT JOIN` interacts with the `WHERE` clause in SQLite? Any insights would be greatly appreciated! For context: I'm using Sql on Linux. Has anyone else encountered this? I'm working on a web app that needs to handle this. I'm working with Sql in a Docker container on Linux.