How to Resolve ORA-12154: TNS:could not resolve the connect identifier specified
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ORA-12154 means that your connection tools including sqlplus cannot use TNSNAMES naming method for some reason. This reminds me that there’re same error patterns in TNS-03505: Failed to resolve name. In that post, I used tnsping to test the connectivity to the listener. In fact, all symptoms in ORA-12154 will be found in TNS-03505. The […]