如何在查询中添加 order by Sum 函数？

Question

我只有这个查询，我想根据 sum 函数的结果添加其记录的排序，如何添加这个？

 Select bus.trans_comp_id, 
 SUM(bus.passengers*trips.cost) 
 From bus inner join trips on bus.ID=trips.bus_id 
 group by bus.trans_comp_id

输出：

trans_comp_id  
 1)   1:412000.00
 2)   2:75000.00

我希望它以 desc 顺序输出：

trans_comp_id  
 2)   2:75000.00
 1)   1:412000.00

Answer 1

您只需将 SUM 函数添加到 ORDER BY 语句即可：

Select bus.trans_comp_id, 
 SUM(bus.passengers*trips.cost) 
 From bus inner join trips on bus.ID=trips.bus_id 
 group by bus.trans_comp_id 
 order by SUM(bus.passengers*trips.cost) desc

Answer 2

只需添加一个 ORDER BY 子句，使用 SELECT 子句中定义的计算值的别名：

 SELECT bus.trans_comp_id, 
        SUM(bus.passengers*trips.cost) AS s
 FROM bus 
 INNER JOIN trips ON bus.ID=trips.bus_id 
 GROUP BY bus.trans_comp_id
 ORDER BY s DESC

如何在查询中添加 order by Sum 函数？

how to add the order by Sum function in a query?

sql-server

sql-order-by