Have you ever had to deal with a complex SQL problem that left you scratching your head? I recently came across a Reddit post that did just that. The poster was trying to create a system where players could earn and exchange points, but with a twist: the points would expire after a certain period of time. The goal was to create a SQL query that would subtract the exchanged points from the total points earned, taking into account the expiration dates.
The poster provided a detailed explanation of their problem, including the table structures and sample data. They also showed their attempt at solving the problem using window functions, but it wasn’t quite working as expected.
After reading through the post, I realized that the solution would require a combination of window functions, case statements, and date calculations. It’s a great example of how SQL can be used to solve complex business logic problems.
If you’re interested in seeing the solution, I’d be happy to walk you through it. Or, if you’re feeling brave, you can try to tackle it yourself and see if you can come up with a working solution.
Either way, it’s a great opportunity to learn and improve your SQL skills.