如何按多個聯合聲明的結果排序？

我不能使用公用表表達式：如何按多個聯合聲明的結果排序？

WITH cte 
      AS (SELECT [StationID], 
         [LastDistribution] 
       FROM  [DB1].[dbo].[ProcessingStations] 
       UNION ALL 
       SELECT [StationID], 
         [LastDistribution] 
       FROM  [DB2].[dbo].[ProcessingStations] 
       UNION ALL 
       SELECT [StationID], 
         [LastDistribution] 
       FROM  [DB3].[dbo].[ProcessingStations] 
       UNION ALL 
       SELECT [StationID], 
         [LastDistribution] 
       FROM  [DB4].[dbo].[ProcessingStations] 
       UNION ALL 
       SELECT [StationID], 
         [LastDistribution] 
       FROM  [DB5].[dbo].[ProcessingStations] 
       ORDER BY [StationID] 
       UNION ALL 
       SELECT [StationID], 
         [LastDistribution] 
       FROM  [DB6].[dbo].[ProcessingStations] 
       UNION ALL 
       SELECT [StationID], 
         [LastDistribution] 
       FROM  [DB7].[dbo].[ProcessingStations] 
       UNION ALL 
       SELECT [StationID], 
         [LastDistribution] 
       FROM  [DB8].[dbo].[ProcessingStations]) 
    SELECT * 
    FROM cte 
    ORDER BY StationID

我怎麼會去這樣做呢？

來源

2013-04-10 Rj.

如何訂購記錄？ – 2013-04-10 13:47:29

從最低站號到聯盟中所有表中最高的站點。 – 2013-04-10 13:48:20

把'ORDER BY'放在最後。例如：'SELECT ... UNION SELECT ... UNION SELECT ... ORDER BY ...' – valverij 2013-04-10 13:48:56

只要把ORDER BY在你的SELECT ... FROM ... UNION ALL陳述鏈的末端：

SELECT [StationID], 
      [LastDistribution] 
      FROM  [DB1].[dbo].[ProcessingStations] 
      UNION ALL 
      SELECT [StationID], 
        [LastDistribution] 
      FROM  [DB2].[dbo].[ProcessingStations] 
      UNION ALL 
      SELECT [StationID], 
        [LastDistribution] 
      FROM  [DB3].[dbo].[ProcessingStations] 
      UNION ALL 
      SELECT [StationID], 
        [LastDistribution] 
      FROM  [DB4].[dbo].[ProcessingStations] 
      UNION ALL 
      SELECT [StationID], 
        [LastDistribution] 
      FROM  [DB5].[dbo].[ProcessingStations] 
      ORDER BY [StationID] 
      UNION ALL 
      SELECT [StationID], 
        [LastDistribution] 
      FROM  [DB6].[dbo].[ProcessingStations] 
      UNION ALL 
      SELECT [StationID], 
        [LastDistribution] 
      FROM  [DB7].[dbo].[ProcessingStations] 
      UNION ALL 
      SELECT [StationID], 
        [LastDistribution] 
      FROM  [DB8].[dbo].[ProcessingStations] 
ORDER BY StationID

下面是一個簡單的例子，我在SSMS做：

DECLARE @a table (x int) 
DECLARE @b table (x int) 
DECLARE @c table (x int) 

insert into @a values (5) 
insert into @a values (4) 
insert into @a values (3) 

insert into @b values (0) 
insert into @b values (1) 
insert into @b values (2) 

insert into @c values (0) 
insert into @c values (1) 
insert into @c values (2) 

select * from @a 
union all 
select * from @b 
union all 
select * from @c 
order by x

而這裏的輸出：

正如你可以看到，即使SELECT * FROM @a來到第一，但它仍然放在那些最後的結果集

來源

2013-04-10 13:55:20 valverij

這不起作用。它只會訂購聯合中的最後一個表。 – 2013-04-10 13:56:53

@Rj你爲什麼這麼想？你試過了嗎？ – 2013-04-10 13:59:47

@Rj。 - 這是不正確的。 'UNION'或'UNION ALL'鏈末尾的'ORDER BY'對* entire *'UNION'應用排序。 – 2013-04-10 13:59:53

爲什麼不能使用CTE？無論如何，你仍然可以做同樣的使用派生表：

SELECT * 
FROM ( SELECT [StationID], 
        [LastDistribution] 
     FROM  [DB1].[dbo].[ProcessingStations] 
     UNION ALL 
     SELECT [StationID], 
        [LastDistribution] 
     FROM  [DB2].[dbo].[ProcessingStations] 
     UNION ALL 
     SELECT [StationID], 
        [LastDistribution] 
     FROM  [DB3].[dbo].[ProcessingStations] 
     UNION ALL 
     SELECT [StationID], 
        [LastDistribution] 
     FROM  [DB4].[dbo].[ProcessingStations] 
     UNION ALL 
     SELECT [StationID], 
        [LastDistribution] 
     FROM  [DB5].[dbo].[ProcessingStations] 
     UNION ALL 
     SELECT [StationID], 
        [LastDistribution] 
     FROM  [DB6].[dbo].[ProcessingStations] 
     UNION ALL 
     SELECT [StationID], 
        [LastDistribution] 
     FROM  [DB7].[dbo].[ProcessingStations] 
     UNION ALL 
     SELECT [StationID], 
        [LastDistribution] 
     FROM  [DB8].[dbo].[ProcessingStations]) A 
ORDER BY StationID

來源

2013-04-10 13:48:31 Lamak

Downvoter care to comment？ – Lamak 2013-04-10 13:49:39

即時得到這個錯誤與你所說的（順便說一下，我不是downvoter） - 消息1033，級別15，狀態1，行22 ORDER BY子句在視圖，內聯函數，派生表，子查詢和公用表表達式，除非TOP或FOR XML也被指定。 Msg 102，Level 15，State 1，Line 33 '）'附近的語法不正確。 – 2013-04-10 13:50:47

@Rj。你使用的是什麼版本的SQL Server？ – Lamak 2013-04-10 13:52:25

見fiddle，只是把ORDER BY上的最後一組是「聯合在一起」。它在沒有CTE開銷的情況下達到相同的結果。

該命令將影響整個統一集。

SELECT 
     [StationID], 
     [LastDistribution] 
    FROM 
     [dbo].[ProcessingStations] 
UNION ALL 
SELECT 
     [StationID], 
     [LastDistribution] 
    FROM 
     [dbo].[ProcessingStations] 
UNION ALL 
SELECT 
     [StationID], 
     [LastDistribution] 
    FROM 
     [dbo].[ProcessingStations] 
    ORDER BY 
     [StationID]

來源

2013-04-10 14:02:27 Jodrell

如何按多個聯合聲明的結果排序？

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