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SQL DEVELOPER to test the new connection is always failure, display an error ORA_12505

Time:09-19

The Internet for a day, didn't find a way to solve, don't know what's the matter, quick collapse!!!!!!!!!!! God, please help,,,,

CodePudding user response:

Listening is not open services

CodePudding user response:

Service, listening to only the two problems

CodePudding user response:

Me too, all day

CodePudding user response:

Error is to monitor the error, can go to see the oracle to monitor whether the service is started; If not yet, to add environment variables, try again,
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