ORA-12560: TNS:protocol adapter error in Windows 10
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Listener and service are up and running. In SQL Plus, if I connect with no login, and execute '**conn sys/pwd@host:port/sid as sysdba**', connection is established successfully. But if I connect **/ as sysdba** or with **username and password** , it always **throws ORA-12560: TNS:protocol adapter error**. What are the possible reasons for this ?
Asked by Aegon
(1 rep)
May 25, 2020, 09:18 PM