ORA-12514

How to Resolve ORA-17629: Cannot connect to the remote database server

by Ed Chen
September 1, 2021April 12, 2022

ORA-17629 ORA-17629 means that it cannot connect to the remote database because of some underlying errors occurred, most likely, there're some error returned. In the… Read More »

How to Resolve ORA-12514: TNS:listener does not currently know of service requested in connect

by Ed Chen
February 14, 2019December 10, 2022
28 Comments

ORA-12514 ORA-12514 means that the listener cannot find any matched service with yours, so it cannot establish the connection with the database for you. As… Read More »

TNSPING, How and Why

by Ed Chen
July 22, 2014December 11, 2022

TNSPING Utility tnsping is a network testing utility provides by Oracle to test the availability of listener through the substrate of Oracle Net. Somebody may… Read More »