Sql 如何将一个字段解析为同一表中的多个字段？

我试图基于分隔符解析字段，在本例中，它是一个“|”。然后，将所有内容合并到同一表中的其他字段Parse1、Parse2等中。下面的代码似乎非常接近，但它只能在我的Dentiable中正确解析。出于某种原因，它不会更新FinalTable中的Parse1、Parse2、Parse3等

SELECT    DISTINCT
          split.a.value ('/A[1]', 'VARCHAR(MAX)') [Piece1],
          split.a.value ('/A[2]', 'VARCHAR(MAX)') [Piece2],
          split.a.value ('/A[3]', 'VARCHAR(MAX)') [Piece3],
          split.a.value ('/A[4]', 'VARCHAR(MAX)') [Piece4],
          split.a.value ('/A[5]', 'VARCHAR(MAX)') [Piece5],  
          split.a.value ('/A[6]', 'VARCHAR(MAX)') [Piece6],  
          split.a.value ('/A[7]', 'VARCHAR(MAX)') [Piece7]
 Field1,
 Field2,
 Field3
FROM [TempTable]
(
SELECT      CAST('<A>' + REPLACE(SrcID, '|', '</A><A>') + '</A>' AS XML) AS Data, Field1, Field2, Field3
FROM  dbo.FinalTable
) a cross apply Data.nodes('/A') AS split(a)

有人知道这有什么问题吗？

我最后用了这个

CREATE FUNCTION [dbo].[SplitIndex](@Delimiter varchar(20) = ' ', @Search varchar(max), @index int)
RETURNS varchar(max)
AS
BEGIN
      DECLARE @ix int,
                  @pos int,
                @rt varchar(max)

      DECLARE @tb TABLE (Val varchar(max), id int identity(1,1))

      SET @ix = 1
      SET @pos = 1


      WHILE @ix <= LEN(@search) + 1 BEGIN

            SET @ix = CHARINDEX(@Delimiter, @Search, @ix)

            IF @ix = 0
                  SET @ix = LEN(@Search)
            ELSE
                  SET @ix = @ix - 1

            INSERT INTO @tb
            SELECT SUBSTRING(@Search, @pos, @ix - @pos + 1)

            SET @ix = @ix + 2
            SET @pos = @ix
      END

      SELECT @Rt = Val FROM @Tb WHERE id = @index
      RETURN @Rt     
END


SELECT dbo.SplitIndex(' ', 'hello big wide world', 1)
SELECT dbo.SplitIndex(' ', 'hello big wide world', 2)
SELECT dbo.SplitIndex(' ', 'hello big wide world', 3)
SELECT dbo.SplitIndex(' ', 'hello big wide world', 4)

---

它工作得很好

我尝试了下面的脚本，它应该可以工作

    IF object_id('tempdb..#FinalTable') is not null drop table #FinalTable
    create table #FinalTable(SrcID varchar(max),Field1 int ,Field2 int ,Field3 int)
    insert into #FinalTable(SrcID,Field1,Field2,Field3)
    select 'a|b|c|d|e|f|g|h|i|j',1,2,3 union all
    select 'aa|sb|cc|bdn|ce|ffg|hjg|kh|ii|kj',1,2,3

    SELECT    DISTINCT
              split.a.value ('/A[1]', 'VARCHAR(MAX)') [Piece1],
              split.a.value ('/A[2]', 'VARCHAR(MAX)') [Piece2],
              split.a.value ('/A[3]', 'VARCHAR(MAX)') [Piece3],
              split.a.value ('/A[4]', 'VARCHAR(MAX)') [Piece4],
              split.a.value ('/A[5]', 'VARCHAR(MAX)') [Piece5],  
              split.a.value ('/A[6]', 'VARCHAR(MAX)') [Piece6],  
              split.a.value ('/A[7]', 'VARCHAR(MAX)') [Piece7],
     Field1,
     Field2,
     Field3
    FROM 
    (
    SELECT  CAST('<A>' + REPLACE(SrcID, '|', '</A><A>') + '</A>' AS XML) AS Data, Field1, Field2, Field3
    FROM  #FinalTable
    ) a cross apply Data.nodes('/A') AS split(a)

---

您能分享一些示例数据、当前输出和所需输出吗？谢谢。你确定你已经把所有的密码都寄给我们了吗？这段代码只显示结果，没有命令实际存储或更新任何数据。 +--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+ | Piece1 | Piece2 | Piece3 | Piece4 | Piece5 | Piece6 | Piece7 | Field1 | Field2 | Field3 | +--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+ | a | b | c | d | e | f | g | 1 | 2 | 3 | | aa | sb | cc | bdn | ce | ffg | hjg | 1 | 2 | 3 | +--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+