SQL Server，VIEWS

Question

好的，我正在尝试在SQL SERVER中创建一个VIEW，以获取最流行的付款方式

CREATE VIEW payType

AS

SELECT SaleID, PayID
FROM tblSales
GROUP BY
tblSales.SaleID, tblSales.PayID

Answer 1

我假设您正在寻找使用每种付款方式的SaleID的数量，您的选择声明将希望是这样的;

SELECT a.PayID
    ,COUNT(a.SaleID) Sales
    ,(COUNT(a.SaleID) / b.Tot)*100 = PercentOfTotal
FROM tblSales a
JOIN (
    SELECT SaleID
        ,COUNT(PayID) Tot
    FROM tbl.Sales
    GROUP BY SaleID
    ) b ON a.SaleID = b.SaleID
GROUP BY a.PayID
ORDER BY COUNT(a.SaleID) DESC