How to count number of events

in

/afs/cern.ch/cms/CAF/CMSALCA/ALCA_ECALCALIB/phisym

./query_nevents.sh first run last run dataset

example

./query_nevents.sh 143000 143178 /AlCaPhiSymEcal/Run2010A-StreamALCARECOEcalCalPhiSym-v4/ALCARECO

actual query:

dbs search --url="http://cmsdbsprod.cern.ch/cms_dbs_prod_global/servlet/DBSServlet" --query "find run,file,sum(file.numevents) wher
e dataset like $dataset and run >= $firstrun and run <=$lastrun" | sed '1,4d' |awk 'BEGIN{n=0}{n=n+$3}END{print n}'