update cd  
set cd.PolicyDetailID = isnull((select top 1 ID from CRM.PolicyDetails pd1

                                                       where pd1.PolicyID = pd.PolicyID

                                                       and pd1.CustomerID = pd.CustomerID

                                                       and pd1.CoverageID = pd.CoverageID

                                                       and pd1.ContractID = 3743

                                                       and pd1.StateCode = 4

                                                       and pd1.StartDate < ISNULL(pd1.EndDate,'30000101')

                                                       order by pd.ID asc), cd.PolicyDetailID) 

      
 CD_PolicyDetailID, pd.ID pd_ID, cd.lastupdatedate

  from clm.Claimdata cd

inner join CRM.PolicyDetails pd on pd.ID = cd.PolicyDetailID

       and pd.CustomerID = cd.CustomerID

       and pd.PolicyID = cd.PolicyID

inner join crm.policy p on p.id=pd.PolicyID

inner join #MatchingCECD tmp1 on tmp1.cdid=cd.id

where pd.ContractID = 1201

and p.CompanyID = 111