ADO.NET is a database technology that is based on the .NET Framework. This technology provides us with a set of classes through which we can query databases, establish connections, receive a response from the database, and perform a number of other operations.

It is important to note that there can be many types of database management systems:
• MS SQL Server uses the language T-SQL
• MySQL and Oracle use the language PL-SQL.

Different database systems can have different types of data.

The ADO.NET functionality is designed to provide developers with a common interface for working with different databases.