The Advantages Of Database Management Systems - 1566 Words

Assignment 1 Matthew Fisher May 15, 2016 Part 1: Database Concepts Topic 1: The Advantages of Database Management Systems A database system would offer the innkeepers several advantages over the flat file system, including enforced data integrity, minimized effort to adapt data into usable information, and abstraction. Storing data in a flat file system, as the innkeepers do, and accessing the data directly pose problems of data integrity. Anomalous data could easily arise if the innkeepers update a record in one file, but do not take care to update related records in other files. Where data are kept in multiple, separate files, but have a conceptual relationship to each other, a file system is of limited use compared to a database management system (DBMS). A DBMS ensures that relationships between entities are enforced. By way of example, a GUEST entity might have a GUEST_ID attribute that appears in multiple locations (e.g. a RESERVATIONS entity). In the file system model, the innkeepers may choose to store addresses of guests in both GUEST and RESERVATION files in order to quickly access address information while booking reservations. If the address is updated in one place, but not the other, this results in a data anomaly, where the address attributes for a guest do not agree. A well-designed database using a DBMS could circumvent this issue by storing no guest information in the RESERVATION table other than GUEST_ID. With this relationship, guests’ addresses can stillShow MoreRelatedThe Advantages Of Database Management Systems1577 Words   |  7 Pagesb) Critically evaluate the advantages of database management systems Advantages of DBMS Data independence: - the separation of data structure of database from the application program that uses the data is called data independence in database management system; you can easily change the structure of database without modifying the application program. For example you can modify the size and data type of a data items ( fields of a database table).data independence is usually consider from two pointsRead MoreDescription Of A Database Management System999 Words   |  4 Pages A database is a collection of information sequenced and organized in such a way that the computer may be able to source and access it on demand by the operator. Like any other management system, a database management system is a collection of programs and protocols that enable the user to enter, sequence, organize, retrieve and select data on demand. Thus, a database management system (abbreviated as DBMS) can be defined as the cumulated system that helps the user to access and make effective useRead MoreA Video Rental Store977 Words   |  4 Pagesconsists of over twenty thousand DVD and VHS videos covering fifteen different genres. Their customer base is over one thousand and the store grosses over thirty thousand dollars monthly. 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