How to get current instance name from T-SQL

Question

How can I get the SQL Server server and instance name of the current connection, using a T-SQL script?

Answer 1

SELECT @@servername will give you data as server/instanceName

To get only the instanceName you should run select @@ServiceName query .

Answer 2

How about this:

EXECUTE xp_regread @rootkey='HKEY_LOCAL_MACHINE',
                   @key='SOFTWARE\Microsoft\Microsoft SQL Server\Instance Names\SQl',
                   @value_name='MSSQLSERVER'

This will get the instance name as well. null means default instance:

SELECT SERVERPROPERTY ('InstanceName')

http://technet.microsoft.com/en-us/library/ms174396.aspx

Answer 3

I found this:

EXECUTE xp_regread
        @rootkey = 'HKEY_LOCAL_MACHINE',
        @key = 'SOFTWARE\Microsoft\Microsoft SQL Server',
        @value_name = 'InstalledInstances'

That will give you list of all instances installed in your server.

---

The ServerName property of the SERVERPROPERTY function and @@SERVERNAME return similar information. The ServerName property provides the Windows server and instance name that together make up the unique server instance. @@SERVERNAME provides the currently configured local server name.

And Microsoft example for current server is:

SELECT CONVERT(sysname, SERVERPROPERTY('servername'));

This scenario is useful when there are multiple instances of SQL Server installed on a Windows server, and the client must open another connection to the same instance used by the current connection.

Answer 4

To get the list of server and instance that you're connected to:

select * from Sys.Servers

To get the list of databases that connected server has:

SELECT * from sys.databases;

Answer 5

another method to find Instance name- Right clck on Database name and select Properties, in this part you can see view connection properties in left down corner, click that then you can see the Instance name.

Answer 6

Just found the answer, in this SO question (literally, inside the question, not any answer):

SELECT @@servername

returns servername\instance as far as this is not the default instance

SELECT @@servicename

returns instance name, even if this is the default (MSSQLSERVER)