From small personal businesses to wide
spread multinational companies, all are using databases as
central component of their record keeping systems. With the
passage of time the amount of information stored in
databases grows, also the risk increases that in a few years
most of it may be lost because of technological changes in
hardware, operating systems and database management systems
(DBMS). It may not be possible to regenerate the information
or maybe very expensive to do so. Many strategies have been
proposed and standards have been developed to cope with the
problem. Selecting a database preservation strategy depends
on many factors including the nature of data stored in the
database, the way it is retrieved and used and the period of
time for which it should be
preserved.