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A query language, also known as data query language or database query language (DQL), is a computer language used to make queries in databases and information systems. In database systems, query languages rely on strict theory to retrieve information. [1] A well known example is the Structured Query Language (SQL).
This category lists those domain-specific programming languages targeted at performing database queries. Subcategories This category has the following 5 subcategories, out of 5 total.
Data query language (DQL) is part of the base grouping of SQL sub-languages. These sub-languages are mainly categorized into four categories: a data query language (DQL), a data definition language (DDL), a data control language (DCL), and a data manipulation language (DML).
SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Edgar F. Codd [12] in the early 1970s. [13] This version, initially called SEQUEL (Structured English Query Language), was designed to manipulate and retrieve data stored in IBM's original quasirelational database management system, System R, which a group at IBM San ...
List-based languages are a type of data-structured language that are based on the list data structure. ... Query languages. Reflective languages ...
Structured Query Language is one of the most popular computer languages used to create, modify and query databases. Subcategories This category has the following 8 subcategories, out of 8 total.
There exist RDF query languages based on other principles. [5] Metalog combines querying with reasoning and has an English like syntax. Algae is a query language developed by the W3C that adds reactive rules, [10] also called actions, that determine for instance whether an Algae expression is a data query or a data update.
GQL is a declarative language with its own distinct syntax, playing a similar role to SQL in the building of a database application. Other graph query languages have been defined which offer direct procedural features such as branching and looping (Apache Tinkerpop's Gremlin [19]), and GSQL, [20] making it possible to traverse a graph ...