select ep_no,date,yyyymm, schd_shft,dayin, dayout,rtype,stype,
etype,stn_in, stn_out,updated_on, inserted_on  
 from CONTRACT_MUSTER 
 where yyyymm between '201001'and ''201006''


delete from from CONTRACT_MUSTER 
 where yyyymm between '201001'and ''201006'
go


delete from from CONTRACT_MUSTER 
 where yyyymm between '201006'and ''201012'
go