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DATABASES
By Dr. Percy Mett
Put simply, a database is simply a collection of information.
An old-fashioned library card catalogue used to find books
is a database. So is an address book. A computer database
is a bit like an electronic filing system, or catalogue.
What’s important in a database is the ability to
quickly access the information and to be able to update
it – information requirements. They are not intended
to be read in the way you’d read a document. Instead,
they have a structure that enables various pieces of data
to be linked together in response to a query posted by
a user. For example, a car dealership might keep a database
consisting of:
• make
• model
• engine size
• number of doors
• number of seats
• colour
• options
• price
• whether in stock or requires ordering
- if ordered, delivery time
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