• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Discuss Data Base Management Systems.

Extracts from this document...


A database is an organised body of related files and or information. It is simply an automated library system an is maintained as an integral part of most organisations worldwide. A cite on the World Wide Web, the Webopedia Computer Dictionary, refers to the database as a collection of information organized and presented to serve a specific purpose. (A telephone book is a common database.) A computerized database is an updated, organized file of machine readable information that is rapidly searched and retrieved by computer. A Data Base Management System is a collection of programs that enables you to store, modify, and extract information from a database. There are many different types of DBMSs, ranging from small systems that run on personal computers to huge systems that run on mainframes. The following are examples of database applications: * computerized library systems * automated teller machines * flight reservation systems * computerized parts inventory systems From a technical standpoint, DBMSs can differ widely. The terms relational, network, flat, and hierarchical all refer to the way a DBMS organizes information internally. ...read more.


Another advantage is that privacy and integrity controls are applicable to groups of users such as passwords and access controls for security. In-terms of privacy, a selection of authourised users can use the database and with reference to integrity, the database enables and promotes accurate input of data into the system. Data independency is also observed and by this we mean the immunity of applications to changes in storage structure and access strategy. Data accessibility and responsiveness is also very quick unlike the manual libraries or filing rooms. However, as much as the database may have its adequate share of advantages, we also have to highlight on the disadvantages of this approach to organisations. Any company, institution or organisation embarking upon the automated database has to recruit specialised personnel, often new employees who have the know-how and are specialists in the computer or Information Technology field. In other cases the current employees undergo a lot of time on training, which then takes up a lot of production time. ...read more.


It is relational in that one can access a customer number from an or customer file to identify the name and address of a customer. Primary keys are used to associate records. In an object-oriented database model, each object is bound together with its own data and set of instructions that describes the behaviour and attributes of the objects. Every object is described by a set of attributes. For example the object building in a database of architectural drawing may have the attribute's type, size, colour, just as in any other database. Every object has a set of procedures or set of methods. For instance, methods for an architectural drawing might include instructions to display, rotate or expand the drawing on a screen. To conclude, we sum up by reiterating Masiiwa and Kabanda's definition that a database is a logically coherent collection of data with some inherent meaning. By data, they mean the known facts that can be recorded and have implicit meaning. Organisations need this system or a DBMS in place because it stores tonnes of information that otherwise would be cumbersome to retrieve if everything was on lever arch files and papers and in employees offices. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Management & Manipulation of Information section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Management & Manipulation of Information essays

  1. Marked by a teacher

    Hardware and Network issues in e-commerce

    5 star(s)

    in the UK it is estimated that by 2005 the m-commerce industry will be worth �2.8 billion (Dano, 2003; Shullman, 2003). Issues with M-Commerce A survey conducted by Paybox (a service provider) found the reason for this was because the majority (65%)

  2. Analysis of market, environmental forces, competitors, marketing mix and consumer implementation.

    5.2 Nintendo Nintendo is currently in a precarious position with its N64 console as it's sales did not meet the company's expectations and by their standard was a huge flop, leaving the company heavily reliant on the launch of its 128-bit GameCube console.

  1. Designing a booking system for an Estate Agent.

    To find out the client requirements and to provide the best solution to the problem I will be an interviewing Raj Tevari who is my main contact asking several questions on how the system works within their organisation. For this I will need to construct questions that will show clear results to help me make a judgement.

  2. Standard Operating Procedures (Sop) recruitment policies and procedures.

    For two vacancies, the certification list appears as follows: 1st ranked eligible 2nd ranked eligible 3rd ranked eligible 4th ranked eligible 5th ranked eligible 6th ranked eligible In the event that eligible #6 and #7 have identical scores (tie score), eligible #7 and all others with identical scores shall be certified accordingly.

  1. The purpose of this document is to provide a design for an electronic payment ...

    User, Shopping Basket, Payment MySQL Database 3 Dependency Descriptions 3.1 Inter-module Dependencies 3.1.1 Use Case Diagram of the Payment System The purpose of this section is to show the main activities of the users in this payment system. Figure 6 describes the actor functionality and shows the two actions users will employ when buying images.

  2. An evaluation of search processes in Artificial Intelligencec

    This is when there is just a flat area between the peaks, with nowhere to turn. Another problem which is less common but still exists is the ridge problem, when considering continuous parameters this is where the system is slowly moving uphill but drops downhill on either side, and if

  1. Background and investigation for designing a database for a DVD rental shop.

    is very familiar, although he is willing to learn how to use Microsoft Access. Investigation Techniques Primary Interview with client These are the set of questions that i will ask during my interview that I will be holding with Ashley, the manager and owner of JenJams.

  2. ICT Security Report

    System Crashes Also, if the main server of system of the site crashes potential information containing customer's security details can leak out and mean that it would no longer be confidential and can also mean that people could obtain it.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work