Abstract
This chapter provides a brief introduction to object orientation and Structured Query Language's (SQL) interpretation of the object model. SQL is a data sublanguage for the access of relational databases that are managed by relational database management systems (RDBMSs). Many books and articles “define” SQL by parenthetically claiming that the letters stand for Structured Query Language. When the letters appear in product names, they have often been assigned this meaning by the product vendors, but the users are ill-served by the claims that the word structured accurately describes the language overall. The letters are not an abbreviation or an acronym, merely the result of the evolution from the name used in early research projects. The 1999 edition of the SQL standard introduces many significant new features into the language, but the most eagerly awaited enhancement is the addition of user-defined type support, often considered to provide “object-oriented SQL” capabilities.
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