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Oracle error sorting!

Source: Internet
Author: User
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ORA-12500:

When the service is started, an error is reported in the background, probably because the corresponding database service is not started.

ORA-12154: Service name cannot be processed by TNS: Install only one version of the Client
1. Open. Start -- Program -- Oracle-orahome92 -- configuration and migration tools -- netconfigurationassistant

2. Select "naming method configuration" -- next -- select "local", "Host Name", and "Oracle names" -- next
3. Confirm OK.

Two versions of clients are installed.
Open PLSQL and prompt that the user name and password are entered. Cancel the operation so that the PLSQL developer interface is displayed,
Menu tools-preferences. In the settings window, select Oracle-connection. In the corresponding settings window, find Oracle Home and select orahome92,Save the settings and restart PLSQL developer. Then you can log on normally.

 

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