方法一：
jingtai =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.6.111)(PORT = 1523))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = prod.enmoedu.com)——取自global_name，可以理解为service_name等同于global_name
)
)
global_name又是来自Db_name. Db_domain
要修改global_name，执行ALTER DATABASE RENAME GLOBAL_NAME TO <db_name.db_domain>
方法2：
jingtai2 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.6.111)(PORT = 1523))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SID = prod)——取自instance_name；
)
)
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