SQL Server 2005 - 選擇頂部N加「其他」

Question

我有一個表，我想選擇頂部5行由列A頂部。我也想有一個第6行標題爲「其他」，它將值除了前5行以外的所有列。

有沒有簡單的方法來做到這一點？我開始有：

select top 5 
    columnB, columnA 
from 
    someTable t 
order by 
    columnA desc 

Answer 1

沒有測試，但嘗試這樣的事：

select * from (
    select top 5 
     columnB, columnA 
    from 
     someTable t 
    order by 
     columnA desc 
    union all 
    select 
     null, sum(columnA) 
    from 
     someTable t 
    where primaryKey not in (
     select top 5 
      primaryKey 
     from 
      someTable t 
     order by 
      columnA desc 
    ) 
) a 

Answer 2

這是從我的頭頂，我會garuntee可怕高效：

SELECT TOP 5 columnB, columnA 
FROM comTable t 
ORDER BY columnA desc 

UNION 

SELECT 'Other', (A.Sum - B.Sum) AS Summary 
FROM (SELECT SUM(columnA) FROM someTable) A 
JOIN (SELECT SUM(One) FROM 
    (SELECT TOP 5 columnA FROM someTable ORDER BY columnA DESC)) B 

Answer 3

我最近很多地方使用了EXCEPT statemnet：（未測試，但我給它去了）

select top 5 
    columnB, columnA 
from 
    someTable t 
order by 
    columnA desc 
UNION ALL 
SELECT 'OTHER' ColumnB, SUM(ColumnA) 
FROM 
(SELECT ColumnB, ColumnA 
FROM someTable t 
EXCEPT 
select top 5 
    columnB, columnA 
from 
    someTable t 
order by 
    columnA desc 
) others 

Answer 4

select top 5 columnB, columnA 
from someTable 
order by columnA desc 

select SUM(columnA) as Total 
from someTable 

在客戶端做減法。

Answer 5

100％未經測試，並且不在我的頭頂，但您可以提供類似這樣的東西。如果我有機會測試今晚我會更新帖子，但有一瓶酒晚餐，這是星期五晚上... :)

WITH CTE AS 
    (
    SELECT 
      ColumnB, 
      ColumnA, 
      ROW_NUMBER() OVER (ORDER BY ColumnB) AS RowNumber 
    FROM 
      dbo.SomeTable 
    ) 
SELECT 
     CASE WHEN RowNumber <= 5 THEN ColumnB ELSE 'Other' END AS ColumnB, 
     SUM(ColumnA) AS ColumnA 
FROM 
     CTE 
GROUP BY 
     CASE WHEN RowNumber <= 5 THEN ColumnB ELSE 'Other' END 
ORDER BY 
     MIN(RowNumber) 

編輯：看起來這幾個工作後，愚蠢的語法錯誤。我已經糾正了這些問題，所以應該按照上面列出的那樣工作。儘管我不能在大型數據集上表現，但值得一試。