Chapter 24: Problem 5

Discuss some applications of active databases.

Short Answer

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Active databases have numerous applications such as data integrity enforcement, maintaining database statistics, security auditing, and automatic refreshing of derived data. They bring efficiency, automate processes and ensure better data management in different areas.

Step by step solution

Understand Active Databases

An active database is a database that includes an event-driven architecture which can respond to conditions both inside and outside the database. Possible uses include security auditing, maintaining data integrity, maintaining database statistics, and refreshing derived data automatically.

Application 1: Data integrity enforcement

Active databases can enforce data integrity. For instance, if a new record is added that doesn't follow the business rules, the database can automatically reject it. This avoids the need for manual checks and corrections and adds a layer of security.

Application 2: Maintaining database statistics

Active databases can maintain database statistics. For example, an active database system can automatically refresh the statistics such as average, sum etc., making it more efficient for data analysis.

Application 3: Security Auditing

Active databases can also be useful for security auditing. For instance, if there is an unusual activity, such as an attempt to access sensitive information, an active database can automatically log the activity and even notify administrators.

Application 4: Automatic Refreshing of Derived Data

Active databases can be used to refresh derived data. That is, when the data in the source tables changes, the changes can be propagated and the derived data can be refreshed automatically. This can be particularly useful in data warehousing environments.

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Discuss some applications of active databases.

Short Answer

Step by step solution

Understand Active Databases

Application 1: Data integrity enforcement

Application 2: Maintaining database statistics

Application 3: Security Auditing

Application 4: Automatic Refreshing of Derived Data

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