其他：关于配置文件tnsnames.ora
SID的方式：
DB_82_204 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = ip)(PORT = 1521))
)
(CONNECT_DATA =
(SID = ora11g)
)
)
service_name：
DB_82_233 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = ip )(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = orcl.oracle11g.com )
)
)
这就要注意登录的时候数据库如何填写，是哪种方式：
ip:orcl sid
ip/orcl servicec_name
也就是这边，由于我配置的是SERVICE_NAME = ORCL，所以IP/service_name（也就是ip/ORCL）
