If you're looking for a quick reference hindi free tutorial for SQL data types, then this is the free tutorial to go to. Packed with tables and definitions, it will be your go-to the learn free tutorial when you need to find out how to handle dates, numbers, strings, Booleans, and more. SQL Data types is the next evolution in database management since the introduction of SQL. This set of functions allows developers to store numeric, date, and text data in their database. This is a very important component for any application that uses relational database management systems.