配置servicename

运行db的sqlplus：sqlplus sys/sys as sysdba （sys/sys为“用户名”/“密码”）
或配置client的监听后运行Client的sqlplus
查看当前服务名：SQL> show parameter service_name
修改服务名：SQL> alter system set service_names=‘orcl’ scope=both;
修改listener.ora（加粗部分）：
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = ORCL)
(ORACLE_HOME = D:\Oracle11g)
(SID_NAME = ORCL)
)
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = D:\Oracle11g)
(PROGRAM = extproc)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS = (PROTOCOL = TCP)(HOST = onest)(PORT = 1521))
)
)

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = /data/oracle/product/11.2.0/db_1)
(PROGRAM = extproc)
)
(SID_DESC =
(GLOBAL_DBNAME=orcl1)
(SID_NAME = orcl)
(SERVICE_NAME = orcl1)
)
)