What is Query language?
A '''Query language''' is a [[formal language]] that is used to make queries to [[database|database system]]s, and other information systems. The result of a query is a [[subset]] of the data. There are different query languages which target different user groups. It is possible to translate a query from one query language into another. *[[XQuery]] is a query language to search [[XML]] information systems *[[XPath]] is used to navigate through XML documents *[[SQL]] is a query language commonly used for [[database]] systems *[[Query by Example]] was developed so that users who rarely use databases can also formulate queries. {{tech-stub}} [[Category:Query languages| ]]