SQL选择顺序

Question

这是我的SQL查询，我只想从销售表中以降序排列我的SellingPrice需要帮助提前谢谢。

例如

SELECT salesMan.salesmanID, salesMan.name, SUM(sale.sellingPrice)
FROM salesMan 
INNER JOIN sale ON salesMan.salesmanID = sale.salesManID
GROUP BY salesmanID, name;

Answer 1

然后加：

order by SUM(sale.sellingPrice) desc

Answer 2

将别名添加到SUM列，并使用其对结果集进行排序。

Select salesMan.salesmanID,salesMan.name, SUM(sale.sellingPrice) as sellingPriceSum
FROM salesMan INNER JOIN
     sale
     ON salesMan.salesmanID = sale.salesManID
GROUP BY salesmanID,name
ORDER BY sellingPriceSum desc;

Answer 3

这应该工作：

Select salesMan.salesmanID, salesMan.name, SUM(sale.sellingPrice) AS totalSale
FROM salesMan INNER JOIN
     sale
     ON salesMan.salesmanID = sale.salesManID
GROUP BY salesmanID, name
ORDER BY totalSale DESC;

您可以像这样简化查询：

SELECT sm.salesmanID, sm.name, SUM(s.sellingPrice) AS totalSale
FROM salesMan sm 
INNER JOIN sale s ON sm.salesmanID = s.salesManID
GROUP BY sm.salesmanID, sm.name
ORDER BY totalSale DESC;