U can get the instance name from V$instance and v$database. If u have set the 
instance name and sid as same in init.ora, then instance name is the SID. BTW 
SID=system identifier for the OS to identify the Oracle to allocate resource. U can 
have multiple instance running in same OS.

HTH
--

On Mon, 28 May 2001 10:20:25  
 Jared Still wrote:
>
>machine_name is found in v$session.
>
>You can't query the server for the SID, as it is
>simply an environment variable.
>
>Jared
>
>
>On Monday 28 May 2001 10:10, Szecsy Tamas wrote:
>> Hi,
>>
>> can I query a database's server's maschine name and SID (not database
>> name!!!!) through SQL*Plus?
>>
>> TIA,
>>
>> Tamas Szecsy
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>Author: Jared Still
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-- 
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