就是你的数据库名,
在oracle安装路径下搜索一下tnsnames.ora文件名的文件,用文本打开
ORA9I =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = xx.xx.xx.xx)(PORT = XXXX))
)
(CONNECT_DATA = (SID = ORA9I)(SERVER = DEDICATED))
)
里边类似于这种格式的东西,ORA9I就是你说的主机字符串,也就是ORA9I =这个位置