名前、ProductNumber、DaysToManufacture、DaysToManufacture/2をHalfDaysToManuFacture、DaysToManufacture*2をDoubleDaysToManuFactureとして生産から選択します。Product WHERE DaysToManufacture>1;
SELECT Name , ProductNumber , DaysToManufacture , DaysToManufacture / 2 AS HalfDaysToManuFacture , DaysToManufacture * 2 AS DoubleDaysToManuFacture FROM Production.Product WHERE DaysToManufacture > 1;