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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.
Beginning SQL Queries is aimed at intelligent laypeople who need to extract information from a database, and at developers and other IT professionals 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 GUIbased 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.
Ch. 1 Relational Database Overview 1
Ch. 2 Simple Queries on One Table 17
Ch. 3 A First Look at Joins 41
Ch. 4 Nested Queries 61
Ch. 5 Self Joins 77
Ch. 6 More Than One Relationship Between Tables 95
Ch. 7 Set Operations 107
Ch. 8 Aggregate Operations 133