The Disadvantages And Disadvantages And Evolution Of Database Management Systems

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Evolution of Database Management Systems Introduction A database is an organized collection of data on which (business) decisions are made. DBMS is a computer system that manages the database. It provides an interface between the user and the actual database stored in a hard disk somewhere. The concept of database has been in existence since 1960s and gradually it is becoming more and more sophisticated. Transformation of Database Management Systems The first generation of database systems were navigational, applications typically accessed data by following pointers from one record to another. The two main data models at this time were the hierarchical model, epitomized by IBM's IMS system, and the Network model and implemented…show more content…
• Incompatible file formats The structures of the file are dependent on the application programming language. Database Systems Introduction In order to overcome the limitations of the file-based approach, the concept of database and the Database Management System (DMS) was emerged in 1960s.There are following advantages and disadvantages of database approach over traditional file based approach. Advantage • Control of data redundancy The database approach attempts to eliminate the redundancy by integrating the file. Although the database approach does not eliminate redundancy entirely, it controls the amount of redundancy inherent in the database • Sharing of data Database belongs to the entire organization and can be shared by all authorized users. • Improved backing and recovery services Modern database management system provides facilities to minimize the amount of processing that can be lost following a failure by using the transaction approach. • Increased productivity The database approach provides all the low-level file-handling routines • Improved maintenance Database approach provides a data
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