This text covers the broad SQL 99 standard and uses Informix as the example database. Coverage includes fundamental concepts and features of SQL, with chapters on functions, subqueries, manipulating data, database security, using views to retrieve useful information from the data dictionary, and using SQL to generate SQL statements. We also discuss how data is structured within the database. A tutorial featuring step-by-step instructions and real-world examples, provides the information needed to fully understand this powerful tool and use it to its fullest potential is included.