ORA-12514錯誤的處理

ORA-12514: TNS:listener could not resolve SERVICE_NAME given in connect descriptor

Cause :
 -------
 In the "<OracleHome>/network/admin/listener.ora" file (in this case,
 "<OracleHome>" refers to the Oracle Home where the Database is installed)
 of the server that hosts the Database (corresponding to the TNS Alias),
 the SID description of that Database does not exist.

 Fix :
 -----
 In order to fix this error, execute the following steps :-

     1. Open the '<OracleHome>/network/admin/listener.ora' file of the
        server that hosts the Database (corresponding to the TNS Alias)
        and go to the section that contains the following lines -

        SID_LIST_LISTENER =
          (SID_LIST =
            (SID_DESC =
              (SID_NAME = PLSExtProc)
              (ORACLE_HOME = /oracle/Ora9iDB)
              (PROGRAM = extproc)
            )
          )

     2. Add the following lines after the 7th line in the above excerpt -

            (SID_DESC =
              (GLOBAL_DBNAME = Ora9iDB)
              (ORACLE_HOME = /oracle/Ora9iDB)
              (SID_NAME = Ora9iDB)
            )

     3. Save the aforesaid change made in the '<OracleHome>/network/admin/
        listener.ora' file.
     4. Restart the TNS Listener corresponding to the Database.