0. 总共三句

select a.username, a.sid,b.SQL_TEXT, b.SQL_FULLTEXT  from v$session a, v$sqlarea b where a.sql_address = b.address;
select * from v$session t1, v$locked_object t2 where t1.sid = t2.SESSION_ID  
alter system kill session '36,31944'; 

1. 查询正在执行的sql，记住想杀死的sql的sid

select a.username, a.sid,b.SQL_TEXT, b.SQL_FULLTEXT from v$session a, v$sqlarea b where a.sql_address = b.address;

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2. 查询并记住serial

select * from v$session t1, v$locked_object t2 where t1.sid = t2.SESSION_ID

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3. 杀死

alter system kill session '36,31944';