Oracle

查看用户锁表

select
    sess.sid,
    sess.serial#,
    lo.oracle_username,
    lo.os_user_name,
    ao.object_name,
    lo.locked_mode 
from v$locked_object lo,  dba_objects ao,  v$session sess 
where ao.object_id = lo.object_id and lo.session_id = sess.sid

解锁语句

alter system kill session 'sid,serial#'

--查询锁表的sid，serial
select b.username,b.sid,b.serial#,logon_time from vsession b where a.session_id = b.sid order by b.logon_time;
--解表
alter system kill session'sid,serial';

MySQL

查看是否有锁表SQL：(注意大小写)

show OPEN TABLES where In_use > 0;  

杀掉锁表进程解锁表:

show processlist; （查看锁表的进程-得到PROCESSID）
kill pid;