How to fix ORA-12560: TNS:protocol adapter error on Windows
(Doc ID 2313175.1)
Last updated on AUGUST 04, 2018
Applies to:Oracle Database - Enterprise Edition - Version 18.104.22.168 to 22.214.171.124 [Release 11.2 to 12.2]
Information in this document applies to any platform.
sqlplus / as sysdba (Bequeath) or connecting using other Non-sysdba users
Incomplete Upgrade or patching
Using Incorrect PATH / Environment Variables to startup the instance
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