SQL Server 2005，将列转换为行

I am trying to turn a table 90 degrees: make columns rows. No PIVOT is allowed since PIVOT requires aggregate functions.

我试图将表格旋转90度:使列行。由于PIVOT需要聚合函数,因此不允许PIVOT。

Example: I have a table with the columns:
ID int,
ISO char(2),
Text varchar(255).

示例:我有一个包含列的表:ID int,ISO char(2),Text varchar(255)。

So I have this:

所以我有这个:

ID ISO Text
-- --- ----
 1 DE  Auto
 2 EN  Car

I'd like to get the following:

我想得到以下内容:

ID EN  DE
-- --- ----
 1 Car Auto

How do you accomplish that?

你是如何实现这一目标的?

6 个解决方案

#1

This answer is really frantisek's, I'm just copying here to correct the mistake (I can't edit directly).

这个答案真的是frantisek的,我只是在这里复制以纠正错误(我不能直接编辑)。

Basically, you use that solution, with a tweak:

基本上,您使用该解决方案,并进行调整:

SELECT 
    max(DE) as DE, max(EN) as EN 
FROM 
    test 
PIVOT (MAX([text]) FOR ISO in (DE,EN)) p

This will get the content into a single row. Also, it drops the ID, since it doesn't make sense if you want a single row (there is no logic to indicate what to do with it when combining into a single row).

这将使内容成为一行。此外,它会丢弃ID,因为如果您想要一行(在组合成单行时没有逻辑来指示如何处理它),这是没有意义的。

Also, the assumption is made that the values in the ISO column are unique, otherwise, this will lose data due to the MAX aggregate.

此外,假设ISO列中的值是唯一的,否则,由于MAX聚合,这将丢失数据。

#2

I found the solution as the following:

我发现解决方案如下:

SELECT 
    ID, DE, EN
FROM 
    TextTable 
PIVOT(MAX([text]) FOR ISO IN (DE,EN)) p

It's possible to use PIVOT with MAX aggregating function over the text.

可以在文本上使用具有MAX聚合功能的PIVOT。

#3

Query without a PIVOT even though other answers prove you can use a PIVOT :)

查询没有PIVOT,即使其他答案证明你可以使用PIVOT :)

SELECT
    MAX(DE.Text) AS DE,
    MAX(EN.Text) AS EN  
FROM TextTable AS TT
LEFT JOIN TextTable AS DE
    ON DE.ID = TT.ID
    AND DE.ISO = 'DE'
LEFT JOIN TextTable AS EN
    ON EN.ID = TT.ID
    AND EN.ISO = 'EN'

#4

If you try this solution and get a syntax error try setting the compatability mode of your database via

如果您尝试此解决方案并获得语法错误,请尝试通过设置数据库的兼容性模式

ALTER DATABASE myDatabase SET COMPATIBILITY_LEVEL = 90;

This will set the compatability to SQLServer 2005 and the above queries will execute w/o a syntax error.

这将设置SQLServer 2005的兼容性,上述查询将执行没有语法错误。

#5

select 
   t.num_claim_no,
   rtrim (xmlagg (xmlelement (e, t.txt_remarks ||'@'|| t.dat_update_date || '  ,  ')).extract ('//text()'), ',') Remarks,
   rtrim (xmlagg (xmlelement (e, t.num_update_no || ' , ')).extract ('//text()'), ',') SrlNo
from 
   gc_clm_gen_info t
   where t.txt_remarks is not null
  group by 
   t.num_claim_no
;

#6

Since you explicitly asked for a non-pivot solution: this should work, if you know which ISOs you will have in the rows. I called the table "Test".

由于您明确要求非透视解决方案:如果您知道行中将包含哪些ISO,这应该可行。我把表称为“测试”。

declare @temp table ([ID] int, [de] varchar(255), [en] varchar(255)) -- add ISOs if necessary

INSERT @temp 
SELECT distinct [ID], '', '' from Test -- ADD '' for other ISOs if necessary

DECLARE c CURSOR read_only 
FOR SELECT [ID], [ISO], [Text] from test

DECLARE  @ID int, @ISO char(2), @Text varchar(255)
OPEN c

FETCH NEXT FROM c INTO @ID, @ISO, @Text
WHILE (@@fetch_status <> -1)
BEGIN
    IF (@@fetch_status <> -2)
    BEGIN
        UPDATE  @temp
        SET     [DE] = case when @ISO = 'DE' then @Text else [de] end,
            [EN] = case when @ISO = 'EN' then @Text else [en] end
                    -- add ISOs if necessary
        WHERE   [ID] = @ID
    END
    FETCH NEXT FROM c INTO @ID, @ISO, @Text
END

CLOSE c
DEALLOCATE c

SELECT * FROM @temp

#1