How to resolve ORA-01004 Error Message in Oracle database

Learn the purpose and how to get to the bottom of the ORA-01004 error message in Oracle.

Description

When you come across an ORA-01004 error, the following error message will appear:

ORA-01004: default username characteristic now not supported; logon denied

Cause

You tried to perform an computerized logon to Oracle, but your gadget does now not help this.

Resolution

The option(s) to resolve this Oracle error are:

Option #1

Try logging on again by imparting a username and password.