7. Advanced SQL and MySQL

This, the last chapter dedicated to SQL and MySQL (although most of the rest of the book will use these technologies in some form or another), discusses the higher-end concepts often needed to work with more complicated databases, like those created in the previous chapter. The first such topic is the JOIN, a critical SQL term for querying normalized databases with multiple tables. From there, the chapter introduces a category of functions that are specifically used when grouping query results, followed by more complex ways to select ...

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