sqlplus user/pw@ip:port/servicename
sqlplus user/pwd@tnsname
sqlplus user/pwd---aix
sqlplus /nolog>connect user/pwd
sqlplus / as sysdba
格式一:jdbc:oracle:thin:@//<host>:<port>/<service_name>
格式二:jdbc:oracle:thin:@<host>:<port>:<SID>
格式三:jdbc:oracle:thin:@< tnsname >