A database is a collection of non-redundant data shareable between different
application systems.
What does this definition mean? What is non-redundant data? Why share data?
What problems arise in sharing data and how can they be overcome? We will begin to
explore these questions by considering the problems encountered by a mythical
manufacturing company, Torg Ltd, in the development of their computer systems.
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The management of Torg Ltd, knowing that many pitfalls await the unwary in the
development of computerised systems, had started cautiously by implementing a simple
system for printing an up-to-date catalogue ...
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