如何按多个联合声明的结果排序？

我不能使用公用表表达式：如何按多个联合声明的结果排序？

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

我怎么会去这样做呢？

来源

2013-04-10 Rj.

如何订购记录？ – 2013-04-10 13:47:29

从最低站号到联盟中所有表中最高的站点。 – 2013-04-10 13:48:20

把'ORDER BY'放在最后。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陈述链的末端：

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

下面是一个简单的例子，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

而这里的输出：

正如你可以看到，即使SELECT * FROM @a来到第一，但它仍然放在那些最后的结果集

来源

2013-04-10 13:55:20 valverij

这不起作用。它只会订购联合中的最后一个表。 – 2013-04-10 13:56:53

@Rj你为什么这么想？你试过了吗？ – 2013-04-10 13:59:47

@Rj。 - 这是不正确的。 'UNION'或'UNION ALL'链末尾的'ORDER BY'对* entire *'UNION'应用排序。 – 2013-04-10 13:59:53

为什么不能使用CTE？无论如何，你仍然可以做同样的使用派生表：

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

来源

2013-04-10 13:48:31 Lamak

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

即时得到这个错误与你所说的（顺便说一下，我不是downvoter） - 消息1033，级别15，状态1，行22 ORDER BY子句在视图，内联函数，派生表，子查询和公用表表达式，除非TOP或FOR XML也被指定。 Msg 102，Level 15，State 1，Line 33 '）'附近的语法不正确。 – 2013-04-10 13:50:47

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

见fiddle，只是把ORDER BY上的最后一组是“联合在一起”。它在没有CTE开销的情况下达到相同的结果。

该命令将影响整个统一集。

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]

来源

2013-04-10 14:02:27 Jodrell

如何按多个联合声明的结果排序？

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