ORACLE cannot delete the current connected user

When ORACLE fails to delete the current connected user and solves the problem of deleting the user in Oracle, the following message is displayed: ORACLE cannot delete the current connected user www.2cto.com. You can use the following statement to run SQL code SQL> select username, sid, serial # from v $ session; username sid serial # -------------------------------- ---------- 1 1 1 2 1 3 1 1 4 1 5 1 6 1 7 1 SYS 8 3 A 9 4 selected 9 rows. SQL> alter system kill session '9, 4'; the system has changed. SQL> drop user a cascade; // delete users and all object users in the user tablespace are discarded. In this way, users can be deleted.