I am new to Oracle, I have installed Oracle Server 11g2 and Oracle SQL Developer (client) tool.
I am able to connect server from command prompt successfully, please have a look here : http://prntscr.com/hytzdn
I am trying to connect the server from Oracle SQL Developer (client) tool but it's not allowing me. I am getting this SID specific error : http://prntscr.com/hyu1i2
Can someone please help me to resolve this? Thanks in advance.