ERROR:  'SELECT
        to_char(pp.SUBMITTIME, 'YYYY-MM-DD HH:MM:SS') SUBMITTIME,
        to_char(pp.QUEUETIME, 'YYYY-MM-DD HH:MM:SS') QUEUETIME,
        to_char(pp.PREPTIME, 'YYYY-MM-DD HH:MM:SS') PREPTIME,
        to_char(pp.STARTTIME, 'YYYY-MM-DD HH:MM:SS') STARTTIME,
        to_char(pe.ENDTIME, 'YYYY-MM-DD HH:MM:SS') ENDTIME,
        (DATE_PART('second', pe.ENDTIME - pp.STARTTIME )) Seconds_Execution,
        pp.SESSIONID,
        pp.PLANID,
        sp.SESSIONUSERNAME,
        pp.ESTIMATEDCOST,
        pp.ESTIMATEDDISK,
        pp.ESTIMATEDMEM,
        pp.TOTALSNIPPETS,
        pe.RESULTROWS,
        pp.NPSID,
        pp.NPSINSTANCEID,
        pp.OPID,
        pp.LOGENTRYID
from
        '' ns,
        '' sp,
        '' pp,
        '' pe
where
        ns.NPSID = pp.NPSID
and     ns.NPSID = pe.NPSID
and ns.NPSID = sp.NPSID
and sp.SESSIONID = pp.SESSIONID
and sp.SESSIONID = pe.SESSIONID
and pp.OPID = pe.OPID
and pp.SUBMITTIME between '2014-06-26 05:00:00' and '2014-06-26 08:00:00'
order by
        pp.SUBMITTIME
'
error                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       ^ found "'" (at char 580) expecting an identifier found a keyword