Comparative Analysis of Legacy Database Systems

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COMPARATIVE ANALYSIS OF LEGACY DATABASE SYSTEMS

Methods and techniques which are used in [RDBMS] Relational Data Base Management System, it was previously followed by the Database System in simple words before the introduction of RDBMS it was previously followed by the Database System. Database Management System is combination of Database Applications and Database Programs, database management system is still running in Universities and Hospitals of world in present days.

Hierarchical System:
In Hierarchical System a parent is the only parent of the child means child has only one parent which is called child parent relationship or it represent the tree diagrsm and we called it database models. Hierarchical Database Management System has some examples and IMS [IBM] is one of its example, And Hierarchies are called Classes.
In old days database programs are used so widely, i.e any one want to record our family members or relatives phone numbers & addresses it is also used by Hospitals, Universities, Libraries, Banks and so far so on. In Libr...

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