Description: Transact-SQL (T-SQL) is an extension of SQL (Structured Query Language) used primarily with relational database management systems. T-SQL includes additional features that allow developers and database administrators to perform more complex and efficient operations in data management. Among its most notable features are the ability to handle stored procedures, user-defined functions, and the implementation of control flow, enabling the creation of more robust and dynamic scripts. T-SQL also provides tools for data manipulation, transaction management, and database-level security implementation. Its integration with various database systems makes it an essential tool for enterprise application development and information system management, facilitating interaction with databases more effectively and securely.
History: Transact-SQL was developed by Sybase in the 1980s as an extension of SQL for its database management system. In 1989, Microsoft acquired a license from Sybase to use T-SQL in its own SQL Server, leading to the popularization of the language. Since then, T-SQL has evolved with each new version of SQL Server, incorporating advanced features and improvements in performance and security.
Uses: T-SQL is primarily used for data management and manipulation in relational database systems. It allows developers to create complex queries, manage transactions, and develop stored procedures and functions that facilitate task automation. It is also used in report creation and data analysis, as well as in implementing security measures and access control to information.
Examples: A practical example of T-SQL is creating a stored procedure that calculates the total sales of a specific product over a given period. Another example is using transactions to ensure that a set of data update operations completes successfully, ensuring database integrity.
