Oracle identifiers ：SID (System Identifier)

tsinglee發表於2008-04-01
OracleIDE
A SID (almost) uniquely identifies an instance. Actually, $ORACLE_HOME, ORACLE_SID and $HOSTNAME identify an instance uniquely.
The SID is 64 characters, or less; at least on Oracle 9i.
The system identifier is included in the CONNECT_DATA parts of the connect descriptors in a tnsnames.ora file.
The SID defaults to the database name.
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