使用 SSIS OR T-SQL 将一列带引号和不带引号的逗号分隔值拆分为多列

Question

我在名为 C0 的列中有逗号分隔的数据。
C0 中的数据如下所示：

C0
"Pacey LLC.",213830ZZ,11/1/2017,11/1/2017,"297,311.74","2,371.40",0.00,"1,325.18",0.00,42.22,"123,986.56"
Mike The Miker,9814140VCD,12/1/2018,12/1/2018,"3,917,751.99","419,743.54","36,642.66","344,090.43",0.00,10.00,"2,434,671.06"

我希望它以这样的方式结束：

F1	F1	F3	F4	F5	F6	F7	F8	F9	F10	F11
"Pacey LLC."	213830ZZ	11/1/2017	11/1/2017	297,311.74	2,371.40	0.00	1,325.18	0.00	42.22	123,986.56
Mike The Miker	9814140VCD	12/1/2018	12/1/2018	3,917,751.99	419,743.54	36,642.66	344,090.43	0.00	10.00	2,434,671.06

我已经尝试过嵌套替换，但是如果没有正则表达式（即 T/SQL）就找不到可靠搜索的模式？我也试过TOKEN approach in SSIS by this feller，但都没有结果。

嵌套替换方法卡在小于 1,000（如 0.00）的货币字段上，而 SSIS TOKEN 方法假定所有字段都是引号分隔的，在我的示例中它们不是。

Answer 1

正如您已经被告知的那样，TSQL 是错误的工具。尽管如此，这是可以做到的（至少对于给定的集合）。如果这是一次性操作，您可以尝试一下。如果这是在现实生活场景中重复发生的任务，我会尝试以适当的格式获取数据。

但是，这适用于给定的行：

DECLARE @t1 TABLE(ID INT IDENTITY, YourString NVARCHAR(1000));
INSERT INTO @t1 VALUES(N'"Pacey LLC.",213830ZZ,11/1/2017,11/1/2017,"297,311.74","2,371.40",0.00,"1,325.18",0.00,42.22,"123,986.56"')
                     ,(N'Mike The Miker,9814140VCD,12/1/2018,12/1/2018,"3,917,751.99","419,743.54","36,642.66","344,090.43",0.00,10.00,"2,434,671.06"');

--您的数据包含特定文化格式的日期（真的！很糟糕）
--更好地切换到ISO8601
--设置日期格式会有所帮助，但不推荐

SET DATEFORMAT dmy;

--第一个 cte 将使用 APPLY 和计算的 TOP()
--这将允许一个一个地获取每个字符。

WITH singleChars AS
(                    
SELECT t.ID
      ,A.Pos
      ,SUBSTRING(t.YourString,A.POs,1) AS CharOnPos
FROM @t1 t
CROSS APPLY(SELECT TOP (LEN(t.YourString)) ROW_NUMBER() OVER(ORDER BY (SELECT NULL)) FROM master..spt_values) A(Pos) --master..spt_values can be any table with sufficient rows
)

--我们继续 递归 cte
--它将遍历字符串并查找我们是否在在引用区域内

,recCTE AS
(
    SELECT *
          ,CASE WHEN CharOnPos='"' THEN 1 ELSE 0 END AS QuoteIsOpen
          ,CAST(CharOnPos AS NVARCHAR(MAX)) AS GrowingString
    FROM singleChars WHERE Pos=1

    UNION ALL

    SELECT sc.ID,sc.Pos,sc.CharOnPos
          ,A.QuoteIsStillOpen
          ,CONCAT(GrowingString,CASE WHEN sc.CharOnPos=N',' AND A.QuoteIsStillOpen=0 THEN N'$%&' ELSE sc.CharOnPos END)
    FROM singleChars sc
    INNER JOIN recCTE r ON sc.ID = r.ID AND sc.Pos=r.Pos+1 
    CROSS APPLY(VALUES(CASE WHEN sc.CharOnPos='"' THEN CASE WHEN r.QuoteIsOpen=1 THEN 0 ELSE 1 END ELSE r.QuoteIsOpen END )) A(QuoteIsStillOpen)
)

--此 CTE 使用 TOP 1 WITH TIES 和 ORDER BY 执行一个技巧，分区 ROW_NUMBER()
--结果将包括ID递归的最终字符串

,newlySeparated AS
(
    SELECT TOP 1 WITH TIES * FROM recCTE
    ORDER BY ROW_NUMBER() OVER(PARTITION BY ID ORDER BY Pos DESC)
)

--最后的SELECT 使用一个技巧来拆分字符串位置和类型安全

SELECT A.*
FROM newlySeparated ns
CROSS APPLY OPENJSON(CONCAT(N'[["',REPLACE(REPLACE(ns.GrowingString,'"',''),'$%&','","'),N'"]]'))
WITH(Company    NVARCHAR(100)        '$[0]'
    ,Code1      NVARCHAR(100)        '$[1]'
    ,Date1      DATE                 '$[2]'
    ,Date2      DATE                 '$[3]'
    ,Decimal1   NVARCHAR(100)        '$[4]' --Using a numbers type might work here, this depends on your machine
    ,Decimal2   NVARCHAR(100)        '$[5]'
    ,Decimal3   NVARCHAR(100)        '$[6]'
    ,Decimal4   NVARCHAR(100)        '$[7]'
    ,Decimal5   NVARCHAR(100)        '$[8]'
    ,Decimal6   NVARCHAR(100)        '$[9]'
    ,Decimal7   NVARCHAR(100)        '$[10]') A
OPTION(MAXRECURSION 0);

结果

+----------------+------------+------------+------------+--------------+------------+-----------+------------+------+-------+--------------+
| Pacey LLC.     | 213830ZZ   | 2017-01-11 | 2017-01-11 | 297,311.74   | 2,371.40   | 0.00      | 1,325.18   | 0.00 | 42.22 | 123,986.56   |
+----------------+------------+------------+------------+--------------+------------+-----------+------------+------+-------+--------------+
| Mike The Miker | 9814140VCD | 2018-01-12 | 2018-01-12 | 3,917,751.99 | 419,743.54 | 36,642.66 | 344,090.43 | 0.00 | 10.00 | 2,434,671.06 |
+----------------+------------+------------+------------+--------------+------------+-----------+------------+------+-------+--------------+