This section contains 1,509 words (approx. 6 pages at 300 words per page) |
With the rise of business data-processing systems on a very large scale during the 1960s and 1970s came the development of databases and database management systems. Databases are large collections of interrelated data stored on computer disk systems from which they can be immediately accessed and revised. Database management systems are large computer programs that "manage" or control the databases.
Data is normally defined as "facts" from which information can be derived. For example, "Janene Clouse lives at 1411 Sycamore Avenue" is a fact. A database may contain millions of such facts. From these facts the database management system can derive information in the form of answers to questions such as "How many people live on Sycamore Avenue?" The popularity of databases in business is a direct result of the power of database management systems in deriving valuable business information from large collections of data.
Relational Databases
Most modern...
This section contains 1,509 words (approx. 6 pages at 300 words per page) |