oracle数据库出现的一些问题

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如果报这个找不到的原因，就在数据库中添加地址，而不是原先常见的只写哥哥oral就好了

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

出现以上的问题是无法识别SID，解决方法如下：

1.找到以下目录,/opt/oracle/product/10.2.0/db_1/network/admin，修改listener.ora，（find -name listener.ora即可找到该文件）为：

# listener.ora Network Configuration File: /opt/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 = /opt/oracle/product/10.2.0/db_1)
                  (PROGRAM = extproc)
             )
            (SID_DESC =
                   (GLOBAL_DBNAME = NIE)
                   (ORACLE_HOME = /opt/oracle/product/10.2.0/db_1)
                   (SID_NAME = NIE)
          )
        )

    LISTENER =
        (DESCRIPTION_LIST =
              (DESCRIPTION =
                   (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC3))
                    (ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain)(PORT = 1523))
              )
        )
添加红色字体部分，注意GLOBAL_DBNAME 和SID_NAME 改成你自己的。

2.启动TNS监听：lsnrctl start

3.查看监听状态：lsnrctl status

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