n nPerfect for end users, analysts, data scientists, and app developers, this best-selling guide will get you up and running with SQL, the language of databases. Youll find general concepts, practical answers, and clear explanations of what the various SQL statements can do. Hundreds of examples of varied difficulty encourage you to experiment and explore. SQL code listings help you see the elements and structure of the language. You can download the sample database to follow along with the authors examples.n n- Covers Oracle, Microsoft SQL Server, IBM DB2, MySQL, PostgreSQL, and Microsoft Access. n- Learn the core language for standard SQL, and variations for the most widely used database systems. n- Organize your database in terms of the relational model. n- Master tables, columns, rows, and keys. n- Retrieve, sort, and format data. n- Filter the data that you dont want to see. n- Convert and manipulate data with SQLs built-in functions and operators. n- Use aggregate functions to summarize data. n- Create complex SQL statements by using joins, subqueries, constraints, conditional logic, and metadata. n- Create, alter, and drop tables, indexes, and views. n- Insert, update, delete, and merge data. n- Execute transactions to maintain the integrity of your data. n- Avoid common pitfalls involving nulls. n- Troubleshoot and optimize queries. n- Plenty of tips, tricks, and timesavers. n- Fully indexed and cross-referenced. nContents nIntroduction n1. Running SQL Programs n2. The Relational Model n3. SQL Basics n4. Retrieving Data from a Table n5. Operators and Functions n6. Summarizing and Grouping Data n7. Joins n8. Subqueries n9. Set Operations n10. Inserting, Updating, and Deleting Rows n11. Creating, Altering, and Dropping Tables n12. Indexes n13. Views n14. Transactionsn nAbout the Author nChris Fehily is a statistician and author based in San Francisco.n