March 2007
Beginner
526 pages
13h 53m
English
book
Introduction to the New Mainframe: z/VSE Basics
by Wolfgang Bosch, Hans Joachim Ebert, Helmut Hellner, G. M. (Jerry) Johnston, Wilhelm Mild, Ingolf Salm, Joerg Schmidbauer, Martin Walbruehl, Mike Ebbers
Content preview from Introduction to the New Mainframe: z/VSE Basics
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Chapter 12. Database management systems on z/VSE 293
These entities would also have relationships between them, for example, a
Customer would be related to orders placed, which would be related to the part
that had been ordered, and so on. Figure 12-1 illustrates an entity relationship
mode.
Figure 12-1 Entities, attributes, and relationships
A database management system (DBMS), such as the DB2 product, provides a
method of storing and using the business data in the database.
12.3 Why use a database?
When computer systems were first developed, the data was stored on individual
files that were unique to an application or even a small part of an ...
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