oracle environment variables and error resolution

Create a new system variable:

1) Variable name ORACLE_HOME

Variable value E:\Oracle\product\11.2.0\dbhome_1

Note: The variable value here is the installation path of the Oracle database you installed yourself. In the path, you will find the project and then find dbhome_1 in turn, and then copy the path to the environment variable value.

The variable path is added: %ORACLE_HOME%\bin

2) Configure TNS_ADMIN

variable name TNS_ADMIN

Variable value E:\Oracle\product\11.2.0\dbhome_1\NETWORK\ADMIN

3) Variable name NLS_LANG.

Variable value SIMPLIFIED CHINESE_CHINA.ZHS16GBK

Note: Here, the author recommends that you copy the above variable values ​​directly. The meaning here is the unified encoding format. The specific ones can be found on Baidu, so I won't go into details here.

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Rewrite the listener.ora file (blue is the added part)

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc) 

      (ORACLE_HOME = f:\oracle\product\10.1.0\Db_1)
      (PROGRAM = extproc) 

    )

 (SID_DESC =
      (GLOBAL_DBNAME = orcl)
      (ORACLE_HOME = f:\oracle\product\10.1.0\Db_1)
      (SID_NAME = orcl)
    )
)