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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292 Introduction to the New Mainframe: z/VSE Basics
12.1 Database management systems for the mainframe
This section gives an overview of basic database (DB) concepts, what they are
used for, and what the advantages are. There are a lot of databases, but we limit
the scope to the two types that are used most on mainframes: hierarchical and
relational databases.
12.2 What is a database?
A database provides for the storing and control of business data. It is
independent from (but not separate from the processing requirements of) one or
more applications. If properly designed and implemented, the database should
provide a single consistent view of the business data, so that it can be centrally
controlled and managed.
One way of describing a logical ...
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