mysql聚合函数求和怎么写

mysql中对聚合函数求和的方法

在mysql中使用sum对聚合函数求和，sql语句如下：

SELECT
p.Id Id,
p.ImgUrl ImgUrl,
p.Title Title,
p.ReferOutPrice ReferOutPrice,
e.`Status`,
SUM(IF(e.`Status`=1 OR e.`Status`=2, ed.Number,0))
FROM
Product p
LEFT JOIN EBOrdersDetails ed ON p.id = ed.ProductId
LEFT JOIN EBOrders e ON ed.PurchaseNo = e.PurchaseNo 
WHERE
p.StoreId = 143 
AND p.`Status` >-1
GROUP BY p.Id