MySQL 8.0 - Query Returning Incorrect Results with GROUP BY and CASE Statements
I've been working on this all day and I'm facing an issue with a query in MySQL 8.0 that seems to return incorrect results when using a `GROUP BY` clause in conjunction with `CASE` statements. The goal is to count the number of users based on their subscription status, but the output doesn't reflect the expected counts. The query I'm using is as follows: ```sql SELECT CASE WHEN subscription_status = 'active' THEN 'Active' WHEN subscription_status = 'inactive' THEN 'Inactive' ELSE 'Unknown' END AS status, COUNT(*) AS user_count FROM users GROUP BY status; ``` When I run the query, I'm expecting to see counts that correspond to the active and inactive statuses. However, the output I get is: | status | user_count | |----------|------------| | Active | 50 | | Inactive | 30 | | Unknown | 20 | The counts seem to be correct, but I don't understand why I'm getting the `Unknown` status. I've verified that all subscription statuses are either 'active' or 'inactive'. I've also tried simplifying the `CASE` statement to only check for `active` and `inactive`, but it still returns unexpected results: ```sql SELECT COUNT(*) AS active_count FROM users WHERE subscription_status = 'active'; ``` This returns the correct count of active users, so the data is accurate. I also checked the data types of the `subscription_status` column to ensure there are no discrepancies. It's defined as ENUM('active', 'inactive') in the schema. Does anyone know why I might be getting the `Unknown` status in my `GROUP BY` query? Are there any edge cases I might be overlooking that could cause this issue?