连接网络上的oracle服务器的主机字符串
(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.168)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = globalDatabaseName) ) )
HOST 远程主机IP地址 PORT 主机端口号 SERVICE_NAME 全局数据库名称
for example with PL SQL：
username：name
password：password
database： (DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.168)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = qjDatabaseName) ) )
connection: as Normal
