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A computer database is a structured collection of records or data that is stored in a computer system. A database relies upon software to organize the storage of data. In other words, the software models the database structure in what are known as database models (or data models). The model in most common use today is the relational model. Other models such as the hierarchical model and the network model use a more explicit representation of relationships Database management systems (DBMS) are usually categorized according to the database model that they support. The data model tends to determine the query languages that are available to access the database. A great deal of the internal engineering of a DBMS, however, is independent of the data model, and is concerned with managing factors such as performance, concurrency, integrity and recovery from hardware failures. In these areas there are large differences between products (which vary from Microsoft Access to File Maker). Very often, an individual's name will be encoded, and then followed by the information. The name and the information are normally separated by a space, comma, or a hyphen. The items are commonly arranged by rows. Each row is referred to as a record. Another form of database is the spreadsheet similar to the format used in Microsoft Excel, for example. They organize data through a variety of means, either by arranging records by surname, first name or by alphabetic order, reverse-alphabetical, time of modification and so on. Because the items are not only arranged horizontally but also vertically, the records is easier to comprehend. Another advantage in using a database is that it allows for data manipulation. Thus, some database systems are able to retrieve data that matches a certain criteria, delete or update the records, as well as perform complex calculations that concern the data. Among the most basic examples of a database is the text file. Most ordinary computer users keep their database in the form of a text -- like a list of email addresses, a list of names, or a list of telephone numbers. It can be kept in programs such as Microsoft Word, Notepad, or Wordpad. This information is useful in many tasks, such as sending email.
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A computer Database, or simply called a Database, is a collection of information and data stored in a computer system.
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