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Cake day: 2024年1月10日

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  • SQL is a language used to manage and interact with most relational databases so it is used often to describe relational databases. There are many tables in a relational database, each is very much like an excel tab. The excel spreadsheet can have many tabs relating to each other. So kinda similar. However a relational database is better defined, more functions and forced relationships, and most important space efficenct. Excel takes probably 100-1000 times more space, and that is best case.