解决Oracle ORA-12505, TNS:listener does not currently know of SID given in connect

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解决方法：

打开Oracle的 listener.ora 文件：

（/oracle/product/10.2.0/db_1/network/admin/listener.ora）

修改前：

# listener.ora Network Configuration File: /app/oracle/oracle/product/10.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
(SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /oracle/product/10.2.0/db_1)
      (PROGRAM = extproc)
    )
)

LISTENER =
(DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.4)(PORT = 1521))
    )
)

------------------------------------------------------------------------------------------------------------------------------

修改后：

# listener.ora Network Configuration File: /app/oracle/oracle/product/10.2.0/db_1/network/admin/listener.ora# Generated by Oracle configuration tools.SID_LIST_LISTENER =  (SID_LIST =    (SID_DESC =      (SID_NAME = PLSExtProc)      (ORACLE_HOME = /oracle/product/10.2.0/db_1)      (PROGRAM = extproc)    )    (SID_DESC =
      (GLOBAL_DBNAME = ORCL) 
      (ORACLE_HOME = /oracle/product/10.2.0/db_1)
      (SID_NAME = ORCL)
    )  )LISTENER =  (DESCRIPTION_LIST =    (DESCRIPTION =      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.4)(PORT = 1521))    )  )