解决方法:
1.查询此用户的会话进程;
SELECT SID,SERIAL# FROM V$SESSION WHERE USERNAME='username';
2.结束此用户的会话进程;
ALTER SYSTEM KILL SESSION '126,1147';
3.删除用户;
DROP USER username CASCADE;
1.查询此用户的会话进程;
SELECT SID,SERIAL# FROM V$SESSION WHERE USERNAME='username';
2.结束此用户的会话进程;
ALTER SYSTEM KILL SESSION '126,1147';
3.删除用户;
DROP USER username CASCADE;