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   ֮ǰ¾É·½·¨ÊÇʹÓà alter session set events ..  »òÕßʹÓÃdbms_system.set_ev·½Ê½
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                        serial_num=>36749,waits=>true,binds=>false);
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             »ñµÃsession_idºÍserial
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         exec dbms_monitor.session_trace_disable(session_id=>1574,serial_num=>36749)
    ¿Í»§¶Ë¼¶:exec dbms_monitor.cliend_id_trace_enable(
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                                 waits =>true,binds=>false)
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