Microsoft has developed a unique way of segregating databases by using named instances. An MSSQL instance is a separate program that runs on a server, and it groups databases within its own memory and processes. When using a named instance in SQL server, the client and administrators must specify the named instance, unlike regular connections where you need only the server name and database. Set up SQL Server named instances from the installation screen. Tips Writer Bio

How to Create a New Instance in SQL Server - 95