Mysql查询多个字段值

Question

任何人都可以帮助mysql查询根据计算显示多个字段。

我有以下数据：

ID | Supplier | Total | Tax | Shipping | Paid
1  | 2        | 100   | 10  | 5        | 0
2  | 2        | 50    | 5   | 2.5      | 1

现在我想要一个如下结果：

Supplier | Total Paid  | Total Unpaid
2        | 57.5        | 115

我的查询如下（到目前为止）

SELECT suppliers.company, SUM(tax+shipping+total) as unpaid FROM poreceived LEFT JOIN suppliers ON suppliers.id = poreceived.supplierid WHERE paid = '0' GROUP BY supplierid

我现在不知道如何显示付费价值。

感谢任何帮助。

Answer 1

尝试在SUM中使用和IF

SELECT
t.supplier,
SUM(IF(t.paid = 1, t.tax + t.shipping + t.total, 0)) AS total_paid,
SUM(IF(t.paid = 0, t.tax + t.shipping + t.total, 0)) AS total_unpaid
FROM poreceived AS t
GROUP BY t.supplier;

这个问题有点相关：

MySql: is it possibile to 'SUM IF' or to 'COUNT IF'?

Answer 2

SELECT 
    supplierid,
    SUM(if(paid=1, total + tax + shipping, 0)) AS Paid,
    SUM(if(paid=0, total + tax + shipping, 0)) AS Unpaid
FROM poreceived
GROUP BY supplierid

或

SELECT 
    supplierid,
    total_paid + shipping_paid + tax_paid as Paid,
    amount - total_paid - shipping_paid - tax_paid as Unpaid
FROM (
    SELECT 
        supplierid
        total + tax + shipping AS amount,
        SUM(if(paid=1,total,0)) AS total_paid,
        SUM(if(paid=1,shipping,0)) AS shipping_paid,
        SUM(if(paid=1,tax,0)) AS tax_paid
    FROM poreceived
    GROUP BY supplierid
) t

Answer 3

您可以使用数据透视查询来获取所需的输出：

SELECT Supplier,
    SUM(CASE WHEN Paid = 1 THEN Total + Tax + Shipping ELSE 0 END) AS `Total Paid`,
    SUM(CASE WHEN Paid = 0 THEN Total + Tax + Shipping ELSE 0 END) AS `Total Unpaid`,
FROM poreceived
GROUP BY Supplier