Table Locks and Remove Table locks

1. How do you know What are the objects have locks??

Solution:

select * from v$lock where block<>0;

if block=0 then no locks if block=1 then there is locks

2. How do you know locked tables? and how do you remove locks?

Solution:

1. select a.object_id, a.session_id, substr(b.object_name, 1, 40)from v$locked_object a,dba_objects bwhere a.object_id = b.object_idorder by b.object_name ;
2. select sid, serial#, command, taddr from v$session where sid=
3. alter system kill session 'sid,serial#';