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Clare Churcher抯 Beginning SQL Queries is your guide to mastering the lingua franca of the database industry: the SQL language. Good knowledge of SQL is crucial to anyone working with databases, because it is with SQL that you retrieve data, manipulate data, and generate business results. Knowing how to write good queries is the foundation for all work done in SQL, and it is a foundation that Clare lays well in her book.
* Does not bore with syntax!
* Helps you learn the underlying concepts involved in querying a database, and from there the syntax is easy
* Provides exceptionally clear examples and explanations
* Is academically sound while being practical and approachable
What you抣l learn
* Write simple queries to extract data from a single table.
* Understand relational algebra and calculus and why they are important.
* Combine data from many tables into one business result.
* Avoid pitfalls and traps such as Cartesian products and difficulties with null values.
* Summarize large amounts of data for reporting purposes.
* Apply set theory to the problems of manipulating data and generating reports.
Who is this book for?
Beginning SQL Queries is aimed at intelligent laypeople who need to extract information from a database, and at developers and other IT people who are new to SQL. The book is especially useful for business intelligence analysts who must ask more complex questions of their database than their GUI朾ased reporting software supports. Such people might be business owners wanting to target specific customers, scientists and students needing to extract subsets of their research data, or end users wanting to make the best use of databases for their clubs and societies.
About the Apress Beginning Series
The Beginning series from Apress is the right choice to get the information you need to land that crucial entry杔evel job. These books will teach you a standard and important technology from the ground up because they are explicitly designed to take you from 搉ovice to professional.?You抣l start your journey by seeing what you need to know梑ut without needless theory and filler. You抣l build your skill set by learning how to put together real杦orld projects step by step. So whether your goal is your next career challenge or a new learning opportunity, the Beginning series from Apress will take you there梚t is your trusted guide through unfamiliar territory!
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