What is the difference between default instance and named instance in SQL?

What is default and named instance?

One instance can be the default instance. The default instance has no name. If a connection request specifies only the name of the computer, the connection is made to the default instance. A named instance is one where you specify an instance name when installing the instance.

What is the default SQL instance name?

To see the service name of an instance (whether unnamed instance or named instance, both will have "service name"s), open up the SQL Server Configuation Manager software and check out the running service names there. The default unnamed instance's service name must be MSSQLSERVER.

What is a SQL named instance?

Microsoft SQL Server (MS-SQL) has a feature called named instances. This feature allows you to run multiple databases on the same host (or clustered hosts) with separate settings. Each db (database) instance runs on its own port.

What is the difference between named instance and instance ID?

INSTANCE NAME = Is attached to a SERVER NAME just like the way it's stated. When you try to connect to an SQL Database you need the server to be able to get in. It's all about the networking and properties of your Physical or Virtual machine hosting your DATABASE. INSTANCE ID = Is attached to SQL Instance Name.