问题
HI, I've just installed Oracle 10 g Express Edition on to my laptop. The platform is Windows XP SP3. Installation went normally. BUt when I try to get connected to the Oracle database via SqlPlus I get "TNS Protocol adapter error".My laptop is on the network.I'd installed the same database on to a Windows Server 2003 and it works fine. What could the problem be?
回答1:
I presume this is ORA-12560: TNS:protocol adapter error. The Oracle documentation describes it as a generic TNS error, but there are two very common causes of it.
- The Windows service for OracleXE has not started, so the database is not up.
- The Oracle SID is not set.
If the service is started then try setting the SID. In a command window type:
C:> set oracle_sid=XE
(or whatever you called it). Then you should be able to connect to the database using SQL*Plus. If this does solve your problem you should probably add it to the environment variables (System info, Advanced tab).
来源：https://stackoverflow.com/questions/6173492/oracle-protocol-adapter-error