Select 编号列

Question

我有一个动态 select 查询，它应该获取列作为 col1、col2......col9、col10 但是它错误地提取为 col1、col10、col11、col12、col2... 不确定如何将它们 select 作为查询是动态的。

请帮忙。

这是我一直在用的动态select。

-- CREATE THE COLUMNS REQUIRED 
SET @DYColumns = STUFF(( SELECT DISTINCT 
    ',' + N'sourceID' 
    + CAST(ROW_NUMBER() 
          OVER (PARTITION BY prgmg_product_id ORDER BY prgmg_product_id, source_id_other) 
         AS NVARCHAR(10)) 
    FROM #Prgmg FOR XML PATH('') ), 1, 1, '');

Answer 1

如果您使用 COALESCE 或 STUFF 来构建列，请确保有一个 ORDER by

此外，你可以有col01,col02,..col10来确保顺序

Answer 2

Drop Table #Prgmg
CREATE TABLE #Prgmg (
    prgmg_product_id INT
    ,source_id_other INT
    );

INSERT #Prgmg (
    prgmg_product_id
    ,source_id_other
    )
VALUES (3310,11478)
    ,(3337,10833)
    ,(3354,11466)
    ,(4039,4846)
    ,(4039,65454)
    ,(4039,65456)
    ,(13337,110833)   -- Added to force over 10
    ,(13354,111466)   -- Added to force over 10
    ,(14039,14846)    -- Added to force over 10
    ,(14039,165454);  -- Added to force over 10


DECLARE @DYColumns NVARCHAR(1000)
    ,@DYSqlQuery NVARCHAR(4000);

--  CREATE THE COLUMNS REQUIRED
SET @DYColumns = STUFF((
            SELECT DISTINCT ',' 
                    + N'sourceID' 
                    + right('00'+CAST(ROW_NUMBER() OVER (ORDER BY prgmg_product_id, source_id_other) AS NVARCHAR(10)),2)
            FROM #Prgmg
            FOR XML PATH('')
            ), 1, 1, '');



-- CREATE THE DYNAMIC SQL AND ADD IN THE CREATED COLUMNS
SET @DYSqlQuery = '
    SELECT prgmg_product_id,' 
        +   @DYColumns 
        +   ' FROM (
                SELECT prgmg_product_id
                    ,CAST(N''sourceID'' + CAST(ROW_NUMBER() OVER (
                        PARTITION BY prgmg_product_id ORDER BY prgmg_product_id, source_id_other
                        ) AS NVARCHAR(10)) AS NVARCHAR(100)) AS Col
                    ,source_id_other
                FROM #Prgmg S1
        ) X
        PIVOT(MIN(source_id_other) FOR Col IN (' + @DYColumns + ')) P'

Print @DYSqlQuery
--EXECUTE sp_executesql @DYSqlQuery;

Returns -- 注意列是有序的。这是通过 Row_Number()

零填充完成的

SELECT prgmg_product_id,sourceID01,sourceID02,sourceID03,sourceID04,sourceID05,sourceID06,sourceID07,sourceID08,sourceID09,sourceID10 FROM (
            SELECT prgmg_product_id
                ,CAST(N'sourceID' + CAST(ROW_NUMBER() OVER (
                    PARTITION BY prgmg_product_id ORDER BY prgmg_product_id, source_id_other
                    ) AS NVARCHAR(10)) AS NVARCHAR(100)) AS Col
                ,source_id_other
            FROM #Prgmg S1
    ) X
    PIVOT(MIN(source_id_other) FOR Col IN (sourceID01,sourceID02,sourceID03,sourceID04,sourceID05,sourceID06,sourceID07,sourceID08,sourceID09,sourceID10)) P

Select 编号列

Select numbered column

sql

sql-server

dynamic-sql