T-SQL is a Microsoft proprietary procedural extension to the SQL (Structured Query Language) used to interact with relational databases. T-SQL is used to write stored procedures, functions, and triggers. It is a powerful tool for database administrators and developers who need to work with large amounts of data. T-SQL is not case sensitive.
T-SQL has been around since the early 1990s and is still widely used today. It is a very powerful tool for working with data, but it can be difficult to learn. There are many online resources available to help you get started, and Microsoft offers a free T-SQL tutorial.
If you are working with a large amount of data, or need to perform complex operations on data, T-SQL is a great tool to learn. It will allow you to write efficient and scalable code.