Try that query:
SELECT 0 As Expr1,EstimatePK, OrderedPartsPK, ReqRecID, ReqOrderedPart,
ReqOrderedPartChanges, ReqOrderedPartName,
RegisteredOn, ReqSupplierFK, ReqQuantity, ReqUnitFK,
ReqRemarks, ReqUnitPrice, OtherExpenses
FROM tblEstimate
WHERE ReqOrderedPart LIKE...