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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;
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alter   system     kill   session   'sid,serial#';
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alter system kill session '1458,15829';


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  execute immediate 'alter table ' || item.table_name || ' disable constraint ' || item.constraint_name;
  end loop;
end;
/ ......

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        Year:     
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S:SELECT abs(-1) value
O:SELECT abs(-1) value from dual
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S:SELECT ceiling(-1.001) value
O:SELECT ceil(-1.001) value from dual
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S:SELECT floor(-1.001) value
O:SELECT floor(-1.001) value from dual
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S:SELECT cast(-1.002 as int) value
O ......

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