Data query language: Difference between revisions

Revision as of 16:03, 5 April 2020

Revision as of 08:59, 5 July 2021

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{{Distinguish|Query language}}

'''Data Query Language''' ('''DQL''') is part of the base grouping of [[SQL]] sub-languages. These sub-languages are mainly categorized into four categories,: a [[Datadata definitionquery language|DDL]], (DQL), a [[Datadata manipulationdefinition language|DML]] and(DDL), a [[Datadata control language|DCL]]. Sometimes(DCL), and a [[Transactiondata Controlmanipulation Language|TCLlanguage]] (DML). Sometimes a transaction control language (TCL) is argued to be part of the sub-language set as well.

DQL statements are used for performing queries on the data within schema objects. The purpose of DQL commands is to get the schema relation based on the query passed to it.