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A comment on Ask HN: What are some great resources to practice SQL?.
I like it because as a beginner you can just follow the learning path. But if you just need a refresher about how to write a window function you can jump right to that section.
Oh, and no account sign-ups which I really appreciate.
I like it because as a beginner you can just follow the learning path. But if you just need a refresher about how to write a window function you can jump right to that section.
Oh, and no account sign-ups which I really appreciate.