Accessing remote oracle database method to get service id!

[Lasith]

I want to develop a user login to remote oracle database where user enters username,password, ip address, port number and service id! I found methods for username,password, ipaddress and portno! But I need method to get service ID! what are they?

QSqlDatabase mydb = QSqlDatabase::addDatabase ("QSQLITE");
mydb.setHostName ("xxx.xxx.xxx.xxx"); //ip address
mydb.setDatabaseName ("my_databwwase");
mydb.setUserName ("my_username");
mydb.setPassword ("my_password");
mydb.setPort("portnumber");