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| Categorie: | Algemeen - Boeken | Van: | APress |
| Meer informatie: | www.apress.com ... | Auteur(s): | Clare Churcher |
| Bladzijden: | 218 | Publicatie-jaar: | 2008 |
Clare Churcher's 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 » Lees meer... |  |
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Clare Churcher's 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 clear examples & explanations;- Is academically sound while being practical & approachable.What you'll 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 & traps such as Cartesian products & difficulties with null values;- Summarize large amounts of data for reporting purposes;- Apply set theory to the problems of manipulating data & 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-based reporting software supports.