Microsoft SQL server is a relational database management system, develop by Microsoft.
It’s built on top of SQL, now one thing here what is SQL?
SQL (Structured Query Language) is just a query language used to interact with a relational database.
History of SQL server:
In 1989 Microsoft joined Sybase and they are released SQL server version 1.0 in this year. However, the partnership between these two ended in the early 1990s and Microsoft maintained ownership rights to the name SQL Server.
Since the 1990s, subsequent versions of SQL Server have been released and develop by Microsoft. The current version is Microsoft SQL Server 2019, released November 4, 2019.