Q

Query

A request for information from a database. There are three general methods for posing queries: (1) Choosing parameters from a menu: In this method, the database system presents a list of parameters from which you can choose. (2) 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. (3) 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.

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