You can insert comment anywhere. There are two data types supported by NDataUnit. String and Number. A test with one result SELECT count(*) as [RowCount] FROM Categories 8 A test with two results to check SELECT sum(UnitPrice) as UnitPriceSum, sum(UnitsInStock) as UnitsInStockSum FROM Products 3119 2222.71 A test with a string result SELECT ProductName FROM Products WHERE ProductID=1 Chai-Not