How do you appropriately spend 21.80 euros at the fair when there are countless attractions to combine? How do you query data that is NOT stored in the SQL Server? How do you generate suitable test data from scratch? Does the SQL Server fail because of something as simple as an (extended) sorting? We ride a rollercoaster, solve the backpack problem, tame the "server of horror" and much more ... Everything with pure T-SQL!

Lots of puzzle challenges: easy to formulate, but even experienced developers fail at the approach. Nevertheless, the solution is amazingly simple and can be implemented without a laptop.