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1 C H A P T E R  1 Introduction to DB2 ATABASE 2 (DB2) for Linux, UNIX, and Windows is a data server developed by IBM. Version 9.5, available since October 2007, is the most current version of the product, and the one on which we focus in this book. In this chapter you will learn about the following: • The history of DB2 • The information management portfolio of products • How DB2 is developed • DB2 server editions and clients • How DB2 is packaged for developers • Syntax diagram conventions 1.1 BRIEF HISTORY OF DB2 Since the 1970s, when IBM Research invented the Relational Model and the Structured Query Language (SQL), IBM has developed a complete family of data servers. Development started on mainframe platforms such as Virtual Machine (VM), Virtual Storage Extended (VSE), and Mul- tiple Virtual Storage (MVS). In 1983, DB2 for MVS Version 1 was born. “DB2” was used to indicate a shift from hierarchical databasessuch as the Information Management System (IMS) popular at the timeto the new relational databases. DB2 development continued on mainframe platforms as well as on distributed platforms. 1 Figure 1.1 shows some of the high- lights of DB2 history. 1.  Distributed platforms, also referred to as open system platforms, include all platforms other than main- frame or midrange operating systems. Some examples are Linux, UNIX, and Windows. D

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