I know that it's good to show them work you've done, but I'm a bit confused on how to go about this. The gist I have right now is that it's best to get a sample database, make a sample problem, and try to solve that problem. I need to provide code and show my reasoning step by step.
Right now I'm going through the SQL courses on here. After I'm done, will I be able to do projects on this site? Or do I need to install SQL onto my computer and download some sample databases? In which case, should I take screenshots? Just keep a doc of my code and reasoning? (Sorry if this sounds like a silly question... I am very much not as familiar with technology as I probably should be.)