February 23rd, 2010
DBMS Models
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A. Relational Database Basics
NETWORK databases were created first. They have very little redundancy but have structural complexity.
HIERARCHICAL databases have a parent/child hierarchy that is faster than network databases, but it suffers from structural inflexibility, redundancy problems, and broken pointers. As it is an older DBMS, it is called a legacy database.
RELATIONAL databases are almost exclusively the database of choice today. Many businesses have converted to Relational DataBase Management Systems (RDBMS) for performance and ease of maintenance.
