2 Replies Latest reply on May 5, 2015 2:33 PM by 2943218

    I/O error-The network adapter could not established the connection


      I am new to database and am reading a book ,Beginning Oracle SQL. 3 edition.

      I have installed SQL Developer on my Window  7 machine.


      Unfortunately i cannot connect to database.

      May be what is connection name?

      which username /password should i use?


      Also what is the service name?


      Please help,i am stuck the whole day!