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select   p.spid,a.serial#,
c.object_name,b.session_id,b.oracle_username,b.os_user_name   from  
v$process   p,v$session   a,   v$locked_object   b,all_objects   c  
where   p.addr=a.paddr   and   a.process=b.process   and  
c.object_id=b.object_id  
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SELECT sid, serial#, username, osuser from v$session;
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