在SQL中对多个选择的输出进行排序

Question

我是SQL的新手，所以这可能是一个非常常见/简单的问题， 我想从最高到最低排序，而不是第1组，第2组，第3组。请参阅下文：

SQL

Select (select SUM(Amt) from Tracker W JOIN Teams T ON W.Username = T.Name where T.Team = '1' and W.Activity = '2' ) AS Team1,
   (select SUM(Amt) from Tracker W JOIN Teams T ON W.Username = T.Name where T.Team = '2' and W.Activity = '2' ) AS Team2,
   (select SUM(Amt) from Tracker W JOIN Teams T ON W.Username = T.Name where T.Team = '3' and W.Activity = '2' ) AS Team3,
   (select SUM(Amt) from Tracker W JOIN Teams T ON W.Username = T.Name where T.Team = '4' and W.Activity = '2' ) AS Team4,
   (select SUM(Amt) from Tracker W JOIN Teams T ON W.Username = T.Name where T.Team = '5' and W.Activity = '2' ) AS Team5,
   (select SUM(Amt) from Tracker W JOIN Teams T ON W.Username = T.Name where T.Team = '6' and W.Activity = '2' ) AS Team6,
   (select SUM(Amt) from Tracker W JOIN Teams T ON W.Username = T.Name where T.Team = '7' and W.Activity = '2' ) AS Team7,
   (select SUM(Amt) from Tracker W JOIN Teams T ON W.Username = T.Name where T.Team = '8' and W.Activity = '2' ) AS Team8,
   (select SUM(Amt) from Tracker W JOIN Teams T ON W.Username = T.Name where T.Team = '9' and W.Activity = '2' ) AS Team9,
   (select SUM(Amt) from Tracker W JOIN Teams T ON W.Username = T.Name where T.Team = '10' and W.Activity = '2' ) AS Team10

现在结果显示如下：

我希望它显示最高到最低而不是球队名称。这可以通过Order By完成吗？我似乎无法让它发挥作用。

Team 2 - 597，Team 7 - 540，Team 3 - 467等

Answer 1

Order by是基于行的操作，而不是基于列的操作。您可以做的是将此查询转换为基于行并按值排序。

select * from (
    select SUM(Amt) as Amt, 'Team1' as Team from Tracker W JOIN Teams T ON W.Username = T.Name where T.Team = '1' and W.Activity = '2' 
    union 
    select SUM(Amt), 'Team2' from Tracker W JOIN Teams T ON W.Username = T.Name where T.Team = '2' and W.Activity = '2'  
    ...) as T
order by Amt

Answer 2

与上面提到的Aaron Bertrand一样，ORDER BY不适用于单行。

您可能希望像这样更改您的查询

select T.Team ,SUM(Amt) as TeamTotal
from Tracker W 
JOIN Teams T 
    ON W.Username = T.Name 
where W.Activity = '2'
AND (ISNUMERIC(T.Team) = 1 AND CAST(T.Team AS INT) BETWEEN 1 AND 10)
GROUP BY T.Team 
ORDER BY TeamTotal DESC