ora-12514:tns:listener does not currently know of service requested in connect descriptor
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تاريخ المشاركة 06 April 2013 - 11:25 PM
you have to try two things :
1- go to net manager and check the listner confugration and oracle home directory (you can open net manager from program file oracle configuration tools)
and restart your database or windows.
if your issue still there try to reconfigur your listner from net configurstion assistant .
and restart your machin.