Difference between revisions of "SQL"
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Revision as of 08:37, 9 February 2016
SQL (Structured Query Language) is a special-purpose programming language designed for managing data held in a relational database management system (RDBMS), or for stream processing in a relational data stream management system (RDSMS).
Contents
Description
Originally based upon relational algebra and tuple relational calculus, SQL consists of a data definition language and a data manipulation language.
The scope of SQL includes data insert, query, update and delete, schema creation and modification, and data access control.
Declarative programming language
SQL is a Declarative programming language.
Relational model
SQL was one of the first commercial languages for Edgar F. Codd's relational model, as described in his influential 1970 paper, "A Relational Model of Data for Large Shared Data Banks."
Despite not entirely adhering to the relational model as described by Codd, SQL became the most widely used database language.
See also
- Data
- Database
- Declarative programming
- Programming language
- Query language
- Programming language
- Relational database management system
- SQL statement examples
External links
- SQL @ Wikipedia
