i have to create a lookup from the following query
Select OTMaster
Where (OTMaster.EffectiveFromDate <= ITL_admin_MonthlyExp.TransactionDate && OTMaster.EffectiveTodate>= ITL_admin_MonthlyExp.TransactionDate) ||
(OTMaster.EffectiveFromDate <= ITL_admin_MonthlyExp.TransactionDate && OTMaster.EffectiveToDate == datenull());
plz help hw can i do dis !