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oracleoracle-xesidservice-name

How can I change the SID of an Oracle XE instance

I needed to change the SID of an Oracle XE database (not the Service Name) to match a production database.

When I tried searching online, most of the pages were describing changing or adding a service name through tnsnames.ora; that's not what I needed to do.

Solution

  • The asktom article has the answer, but the formatting and verbosity makes it hard to follow, so here's a summary:

    [XE_HOME] means where Oracle XE is installed. Normally this is C:\oraclexe\app\oracle\product\10.2.0\server.

    Make sure you have Administrator privileges or the procedure will fail.

    1. Configure the SPFILE (you can remove the old file if you want)
      1. copy [XE_HOME]\dbs\spfileXE.ora [XE_HOME]\dbs\spfileNEW_SID_NAME.ora
      2. copy [XE_HOME]\database\initXE.ora [XE_HOME]\database\initNEW_SID_NAME.ora
      3. Edit [XE_HOME]\database\initNEW_SID_NAME.ora: It should contain a single line like this: SPFILE='[XE_HOME]\server\dbs/spfileNEW_SID_NAME.ora'
    2. Shutdown and replace the old service with a new:
      1. sqlplus / as sysdba and execute shutdown
      2. lsnrctl stop
      3. oradim -new -sid NEW_SID_NAME -startmode auto -pfile [XE_HOME]\database\initNEW_SID_NAME.ora
      4. oradim -delete -sid XE
      5. lsnrctl start
    3. Update the ORACLE_SID environment property (System Settings > Advanced > Environment)
    4. Force Oracle to register with listener
      • sqlplus / as sysdba and execute alter system register;

    You can verify that the SID was changed by executing the following query: select instance_name from v$instance;