When trying to connect to Oracle 12c database, get the below error.
ORA-12514, TNS:listener does not currently know of service requested in connect descriptor.
The database Connection URL is invalid.
If the Oracle 12c database is SID oriented, the Connection URL should be in this format.
If the Oracle 12c database is Service oriented, the Connection URL should be in this format.
In both cases, the Class Name should be [oracle.jdbc.driver.OracleDriver] and you will need to use Driver Type [Custom] for Oracle 12c. Please note that you will also need to place the ojdbc driver under <atom home>/userlib folder.