The article presents a collection of SQL puzzles aimed at improving query-writing skills by examining real-world scenarios. The author emphasizes that these challenges arise from practical experiences, encouraging readers to first attempt solving them independently. It focuses particularly on calculating the average duration tickets remain in the 'Doing' stage, addressing common complexities such as backward movements and tickets that are still in progress. By providing relevant coding examples and a GitHub link for resources, readers are equipped to experiment with the solutions themselves.
The article introduces a series of SQL puzzles based on real-world scenarios, designed to expand understanding and enhance query-writing skills through practical challenges.
The key objective is to derive average time tickets spend in the Doing stage, requiring consideration of edge cases like backward moves and ongoing statuses.
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