The client is equipped with the server on the same computer, Windows XP.
ORA-12560: TNS: Protocol Adapter Error
Cause: a generic protocol adapter error.
Action: Check addresses used for proper protocol specification Before reporting this error, look at the error stack and check for lower level transport errors For further details, turn on tracing and reexecute the operation Turn off tracing when the operation is complete....
step:
1. Check that your database is created, OraclesEVIECE ~ The service is not available.
"Right click on my computer, manage, and service."
2. Check the settings inside your environment variables right.
"Right-click on my computer, attribute, advanced, environment variable, system variable, and see Dongdong behind Oracle_sid"
