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From the Publisher
From the Preface
SQL is the lingua franca of the data professional. At the same time, it doesn’t always get the attention it deserves compared to the hot tool du jour. As result, it’s common to find people who use SQL frequently but rarely or never go beyond the simplest queries, often enough because they believe that’s all there is.
This book shows how much SQL can do, expanding users’ tool boxes. By the end of the book you will have seen how SQL can be used for statistical analysis; to do reporting in a manner similar to Business Intelligence tools; to match text data; to perform sophisticated analysis on date data; and much more.
Who This Book Is For
This book is meant to be for any SQL user who wants to take their queries further. In terms of ability, it’s meant for someone who knows at least some SQL—you might have read Alan Beaulieu’s Learning SQL, for example—and ideally you’ve had to write queries on data in the wild to answer a real-life problem.
Other than those loose parameters, this is a book for all SQL users, including data engineers, data scientists, data visualization folk, BI people, etc. Some of these users may never or rarely access databases directly, but use their data visualization, BI, or statistical tool to query and fetch data. The emphasis is on practical queries that can solve real-world problems.
Where a small amount of theory appears, it’s there to directly support the practical elements.
