1 查出用户的session:

SELECT SID, SERIAL# FROM V$SESSION WHERE USERNAME='epdm';

 

2 杀掉用户epdm的session:

ALTER SYSTEM KILL SESSION 'SID, SERIAL#';

 

3 删掉用户epdm

DROP USER EPDM CASCADE;

 

ps:如何查看当前登录数据库的用户:

SELECT * FROM V$SESSION WHERE TYPE='USER';