Database Logon Trigger to Block Sessions from Some Users using Toad,SQL Developer….

Here is an example of  database logon trigger for blocking specific users from accessing database through tools like  Toad or SQL Developer tools, etc.

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Any database users with “ADMINISTER DATABASE TRIGGER” will bypass the database logon trigger.

SQL> grant ADMINISTER DATABASE TRIGGER to testuser;

Grant succeeded.

SQL> connect testuser
Enter password:
Connected.