Annotated Bibliography On Database Management Systems

1207 WordsMar 1, 20155 Pages
The ability to store information has always been important for our survival. In the beginning, information used to be shared by word of mouth. Then, with the invention of writing, data slowly started to be stored in books kept in libraries, sorted in specific order that made them easily accessible. Finally, the invention of the computers led to the evolution of databases. Databases are important, because thanks to them humans are able to store and later on retrieve information. The way in which databases arise is very simple. It all begins as a list in a word-processing system. As the size of the list increases, the data starts to appear inconsistent. If this occurs, Database Management Systems come to help, due to the fact they can store a large amount of information in a number of tables linked to each other. Programs such as Access are able to add new data to a database or make changes to already existing data from the database; they are even able to delete information. These features assist people in analyzing and categorizing information in the following way: Tables lie in the core of any given database. Thanks to them, the possibility of redundancy is greatly reduced. A database can consist of a number of different tables which enables the researcher to break information down into smaller (and easier to analyse) pieces. Just like spread sheets, they consist of rows (also called records) and columns (fields). By using records, researchers are able to combine
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