Essay by PaperNerd ContributorUniversity, Bachelor's November 2001

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There are many different types of Searchable databases on the internet that can be used to retrieve all types of data. To under stand how different databases work we must first understand what a Searchable database is. A database is a collection of data or information organized for rapid search and retrieval, especially by a computer. Databases are structured to facilitate storage, retrieval, modification, and deletion of data in conjunction with various data-processing operations. A database consists of a file or set of files that can be broken down into records, each of which consists of one or more fields. Fields are the basic units of data storage. Users retrieve database information primarily through queries. Using keywords and sorting commands, users can rapidly search, rearrange, group, and select the field in many records to retrieve or create reports on particular aggregates of data according to the rules of the database management system being used A request for information from a database.

There are three general methods for posing queries: choosing parameters from a menu: In this method, the database system presents a list of parameters from which you can choose. This is perhaps the easiest way to pose a query because the menus guide you, but it is also the least flexible. query by example (QBE): In this method, the system presents a blank record and lets you specify the fields and values that define the query. query language: Many database systems require you to make requests for information in the form of a stylized query that must be written in a special query language. This is the most complex method because it forces you to learn a specialized language, but it is also the most powerful. To make a request for information from a database.

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