What is a SQL Server instance?
On a given server you can run multiple SQL Server services, each with their own ports, logins, and databases. Each of these services is called an "instance" of SQL Server. You can further categorize these as the "primary instance" and "named instances." The primary instance can be accessed using just the server name or IP address. The named instances, on the other hand, are accessed by appending a backslash and the instance name. For instance, to connect to the instance called "abc" on the local server, use: "127.0.0.1abc". In SQL Server 2005, you can have up to 50 instances running simultaneously on a server.
Dig Deeper on Microsoft SQL Server 2000
Related Q&A from Adam Machanic
Migrating to SQL Server 2005 from SQL Server 2000 is a hefty feat when compared to upgrading from 7.0 to SQL Server 2000. Site expert Adam Machanic ...continue reading
Multiple readers can sometimes read the same row simultaneously causing a false result. SQL Server 2005 expert Adam Machanic suggests modifying the ...continue reading
Database Snapshots feature in SQL Server 2005 Enterprise Edition creates read-only files. For these separate databases, our site expert Adam Machanic...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.