![]() A relational database in first normal form has a very strong chance of having an update anomaly. With a relational database in fifth normal form, there is no chance of having an update anomaly. There are five degrees of normalization, with one being the lowest, and five being the highest. To what degree data duplication is eliminated is gauged in a relational database by something called data normalization. Relational databases are a collection of tables that are designed to reduce data duplication and redundancy. Today's information technology systems are built to a large extent on relational databases. ![]() And an update anomaly can cause problems such as a slow performing database and PC, and when there are too many they can cause a crash. It is a record that remains on a database without a link, in short. The same condition can occur on your Windows-based PC or laptop registry if parts of a program are removed, but the registry entry for the program still exists. An update anomaly is a condition that can occur if a database is not constructed and maintained correctly.
0 Comments
Leave a Reply. |