合成數據項 sql查詢

//合併字符串

select Lastname+','+FirstName
AS Employees
FROM Employees
ORDER BY LastName,FirstName ASC

//對數字列進行運算

select ROUND(UnitPrice*8,2)//數字列的乘法運算並取四捨五入的結果
AS DiscountPrice
From Products
where ProdutID=10032