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2. SQL - Wikipedia

   en.wikipedia.org/wiki/SQL

   SQL is designed for a specific purpose: to query data contained in a relational database. SQL is a set-based, declarative programming language, not an imperative programming language like C or BASIC. However, extensions to Standard SQL add procedural programming language functionality, such as control-of-flow constructs.

3. Microsoft SQL Server - Wikipedia

   en.wikipedia.org/wiki/Microsoft_SQL_Server

   Microsoft SQL Server (Structured Query Language) is a proprietary relational database management system developed by Microsoft.As a database server, it is a software product with the primary function of storing and retrieving data as requested by other software applications—which may run either on the same computer or on another computer across a network (including the Internet).

4. Relational model - Wikipedia

   en.wikipedia.org/wiki/Relational_model

   Relational model. The relational model ( RM) is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in 1969 by English computer scientist Edgar F. Codd, [1] [2] where all data is represented in terms of tuples, grouped into relations. A database organized in terms of the ...

5. MySQL - Wikipedia

   en.wikipedia.org/wiki/MySQL

   MySQL ( / ˌmaɪˌɛsˌkjuːˈɛl /) [5] is an open-source relational database management system (RDBMS). [5] [6] Its name is a combination of "My", the name of co-founder Michael Widenius 's daughter My, [7] and "SQL", the acronym for Structured Query Language.

6. Create, read, update and delete - Wikipedia

   en.wikipedia.org/wiki/Create,_read,_update_and...

   Together these four operations make up the basic operations of storage management known as CRUD: Create, Read, Update and Delete. Use cases Databases. The acronym CRUD refers to the major operations which are implemented by databases. Each letter in the acronym can be mapped to a standard Structured Query Language (SQL) statement.

7. SQL syntax - Wikipedia

   en.wikipedia.org/wiki/SQL_syntax

   SQL syntax. The syntax of the SQL programming language is defined and maintained by ISO/IEC SC 32 as part of ISO/IEC 9075. This standard is not freely available. Despite the existence of the standard, SQL code is not completely portable among different database systems without adjustments.

8. Join (SQL) - Wikipedia

   en.wikipedia.org/wiki/Join_(SQL)

   Join (SQL) A Venn diagram representing the full join SQL statement between tables A and B. A join clause in the Structured Query Language ( SQL) combines columns from one or more tables into a new table. The operation corresponds to a join operation in relational algebra. Informally, a join stitches two tables and puts on the same row records ...

9. Relational database - Wikipedia

   en.wikipedia.org/wiki/Relational_database

   A relational database ( RDB [1]) is a database based on the relational model of data, as proposed by E. F. Codd in 1970. [2] A database management system used to maintain relational databases is a relational database management system ( RDBMS ). Many relational database systems are equipped with the option of using SQL (Structured Query ...