Connect to SQLPLUS : ERROR: ORA-12560: TNS:protocol adapter error ( WINDOWS )

Problem :

Causes :

Not set Enviroment

Solution :

set your ORACLE_HOME and your PATH
set ORALE_HOME="your oracle path"
set PATH=%ORACLE_HOME%\bin;%PATH%


example :

set ORACLE_HOME=C:\product\11.2.0\dbhome_1
set PATH=%ORACLE_HOME%\bin;%PATH%

pict :

Thanks.