Description: ANSI SQL, or ANSI standard SQL, is a standardized version of the Structured Query Language (SQL) used for managing and manipulating relational databases. This standard was developed by the American National Standards Institute (ANSI) and the International Organization for Standardization (ISO) to provide a common framework that allows interoperability between different database systems. SQL ANSI defines a set of rules and syntax that database management systems (DBMS) must follow, facilitating application portability and consistency in query execution. Its main features include the ability to perform data selection, insertion, updating, and deletion operations, as well as defining data structures and managing transactions. The relevance of SQL ANSI lies in its widespread adoption in the industry, allowing developers and database administrators to work across different platforms without needing to learn a new language for each system. This not only saves time but also reduces the possibility of errors and improves efficiency in database application development.
History: The development of ANSI SQL began in the 1970s when IBM created the SQL language for its database management system, System R. In 1986, ANSI adopted SQL as a standard, known as SQL-86. Since then, there have been several revisions of the standard, including SQL-89, SQL-92, SQL:1999, SQL:2003, SQL:2008, SQL:2011, and SQL:2016, each introducing new features and improvements.
Uses: ANSI SQL is primarily used in the development of applications that require access to relational databases. It allows developers to write queries that are compatible with multiple database management systems, facilitating data migration and system integration. It is also used in report generation and data analysis, as well as in general database administration.
Examples: A practical example of ANSI SQL is the query to select all records from a table called ‘customers’: ‘SELECT * FROM customers;’. Another example is inserting a new record: ‘INSERT INTO customers (name, email) VALUES (‘John Doe’, ‘[email protected]’);’.
