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Advantages And Disadvantages Of Database Management System

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Fundamentals of Database Management Systems

What is a Database?
Database is a collection of data.
Mostly the data in the database specially focus on a one organization and have relationship among them. Earlier times those databases were file base databases and not computerized .While using those file base databases many errors occurred and there were many Disadvantages. Nowadays Databases are computerized.
What is a Database Management System? (DBMS)
DBMS is a Software Designed to assist in maintaining and utilizing a database.

References
Wikipedia. (2015) Database [Online] June 2005. Available from: https://en.wikipedia.org/wiki/Database [Accessed: 19th June 2015]

Evolution of Database Management System

In earlier time computers mainly
…show more content…
• Data integrity and security – can restrict the data visibility for different types of users
• Data administration – an admin or more than one admin can manage whole the data in database.
• Sharing of Data
• Concurrent access and crash recovery - More than one user can access the data in same time without crashing.
• Reduced application development time – data insert, update, delete and retrieving can easily done with DBMS queries.

Disadvantages of Database Management Systems

• Complexity- a database creates additional complexity and requirements.
• Qualified Personals – To use these data bases there should be a qualified person who has knowledge about DBMS and its queries.
• For small and simple applications for single users a database system is not advisable.
• Some DBMS software requirements are very high and they are very costly.

Descriptions of job roles related to Database Management System

• Data Administrator(DA) - have to do following activities
 Specifying data standards across database.
 Establishing policies: data usage, security and authorization, data flows into and out of the
…show more content…
 Gather information that will be recorded in database.
 Divide information into tables.
 Turn information into columns.
 Specify primary keys.
 Set up table relationships.
 Follow W3 standards.
 Refine and enhance design.
 Code document and test programs.

• Application Developer – has to make computers perform specific tasks, based on the client’s specification. His tasks are

 Establishing a detailed program specification through discussion with clients.
 Clarifying what actions the program intends to perform.
 Breaking down program specification into its simplest elements and translating this logic into a programming language.
 And also assist to design database according to requirements.
• End User- End user is the person who uses a bug free Software after it has been fully developed and marketed. And this kind of user don’t use that software for development .They only Use the software but there are another kind of users who uses the software for development and they are not end users.
 Installing software
 Agree to the license agreement and the terms and condition of software vendor
 Using Software.

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