With SQL (Structured Query Language) you can create tables within a database, add and delete data, query for information, change system settings, and trigger actions based on changes to the database. Whether you're a programmer, administrator, or database designer, Teach Yourself SQL in 21 Days, Second Edition provides all the information needed to fully understand this powerful tool and use it to its fullest potential.Using step-by-step instructions, real-world examples, and expert advice, you'll improve your productivity, taking your skills to new heights. Completely updated and revised, this easy-to-understand guide explores SQL, showing you how to construct and optimize queries, use stored procedures and triggers to tune a database for maximum performance, and master the fundamental concepts and features of SQL.

Q&A sections, step-by-step instructions, and review sections make learning easy and fun
Shows how to create tables, modify data, incorporate security features, and tune the database for optimum performance
Emphasizes common database concepts, including SQL functions and queries

From the Publisher

Fully updated and revised to include coverage of PL/SQL and Transact SQL. this easy-to-understand guide teaches users everything they need to know from database concepts and processes to implementing security and constructing and optimizing queries. - Q&A sections, step-by-step instructions, and review sections make learning easy and fun

- Shows how to create tables, modify data, incorporate security features, and tune the database for optimum performance

- Emphasizes common database concepts, including SQL functions and queries

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