Step 1: Decide on Your Instance Identifier (SID) (59)

An instance is made up of the system global area (SGA) and the background processes
of an Oracle Database. Decide on a unique Oracle system identifier (SID) for your
instance and set the ORACLE_SID environment variable accordingly. This identifier is
used to distinguish this instance from other Oracle Database instances that you may
create later and run concurrently on your system.
The following example for UNIX operating systems sets the SID for the instance that
you will connect to in Step 4: Connect to the Instance:
% setenv ORACLE_SID mynewdb

第一步 : 確定例項的識別符號(SID)

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