Configure Listener
I was bit confused when i first read about listeners but now its very simple for me and here i will explain you how to configure listener and start and stop etc.Concept :Listener will simple listen on port specified by you and will accept connections on that port , and finally will connect that connection to started instance of databaseclient --> LISTENER --> DATABASE INSTANCE (Your started database)Important Things which you will require while configuring listenerORACLE_HOMEORACLE_SIDPORT...
