How to force disconnect a user in Oracle

In Oracle, the method for disconnecting a user is to first find the current process of the target user. Note that the process is serial # Instead of serial. Some introductions on the Internet miss the #: select sid, serial # from v $ session where username = 'erp '; using this statement, a process list is returned. Each row has two numbers, then, replace the following sid and serial www.2cto.com alter system kill session 'sid, serial '; for example, alter system kill session '2016'; multiple rows of records may be returned through the select statement, therefore, the alter statement must be executed multiple times.