update TravelApply set TravelApply.ApplyUser=swsmu_bpmdb.dbo.BPMU_USER.DspName ,
TravelApply.UserName=swsmu_bpmdb.dbo.BPMU_USER.DspName
from swsmu_bpmdb.dbo.BPMU_USER
where TravelApply.ApplyUser='' and TravelApply.ApplyAccount=swsmu_bpmdb.dbo.BPMU_USER.Account