This is not really a good idea and habit even for learning purposes. You should be able to create a database if you have it on your local, if not you can always install a new one.
Please verify if you have created the tables using database component configurator. Side note, if you do recreate, it will drop the current tables and make you loose data. You should check the results of the scripts if they are successfully executed or not. DB configurator can be confusing, refer to the documentation or ask further questions.
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