Ownership of data in traditional legacy systems often leads to data redundancy. This in turn leads to several data management problems. What are they? How does the database approach solve them?
What will be an ideal response?
Data redundancy causes significant data management problems in three areas: data storage, data updating, and currency of information. Data storage is a problem because if multiple users need the data, it must be collected and stored multiple times at multiple costs. When multiple users hold the same information, changes must be updated in all locations or data inconsistency results. Failure to update all occurrence of a data item can affect the currency of the information.
With a database system, these problems are solved. There is no data redundancy since a data item is stored only once. Hence changes require only a single update, thus leading to current value.
PTS: 1
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