在sql中用多个分隔符(和-)分割数据和拥有自己的规则

Question

我有像这个1,2,3,4-8,10,11这样的数据

我希望用以下2条规则将数据分成几行：

1. ,将只将数据拆分为行。Ex 1,2,3成为： 1 2 3
2. -将分裂成系列编号。Ex 4-8成为： 4 5 6 7 8

SQL查询如何做到这一点？请回答并保持简单。

Answer 1

只要您的间隔小于2048 (如果该数字还可以更高，请告诉我)，只要您的数据间隔小于2048，您的@data就会遵循您当前的语法：

declare @data varchar(50) = '1,2,3,4-8,10,11'

;with x as
(
     SELECT t.c.value('.', 'VARCHAR(2000)') subrow
     FROM (
         SELECT x = CAST('<t>' + 
               REPLACE(@data, ',', '</t><t>') + '</t>' AS XML)
     ) a
     CROSS APPLY x.nodes('/t') t(c)
), y as
(
SELECT 
CAST(coalesce(PARSENAME(REPLACE(subrow, '-', '.'), 2),
              PARSENAME(REPLACE(subrow, '-', '.'), 1)) as int) f,
CAST(PARSENAME(REPLACE(subrow, '-', '.'), 1) as int) t from x
)
select z.number from y
cross apply 
(select y.f + number number
from master..spt_values
where number <= y.t - y.f and type = 'p'
) z

结果：

1
2
3
4
5
6
7
8
10
11

Answer 2

CREATE FUNCTION dbo.MultipleDelemiterSplit
(
   @List       NVARCHAR(MAX),
   @Delemiter1 Varchar(100),
   @Delemiter2 Varchar(100)
)
RETURNS  TABLE
AS

   RETURN
   ( 
      SELECT Item = FirstSet.cnt.value('(./text())[1]', 'nvarchar(4000)')
      FROM
      (
        SELECT x = CONVERT(XML, '<cnt>'
          + REPLACE(REPLACE(@List, ISNULL(@Delemiter1,''), '</cnt><cnt>') , ISNULL(@Delemiter2,''), '</cnt><cnt>')
          + '</cnt>').query('.')
      ) AS a CROSS APPLY x.nodes('cnt') AS FirstSet(cnt)
   );

GO 

Select * From dbo.MultipleDelemiterSplit ('10:0,11:1,12:3,13:4,15:5,16:6',',',':')

Answer 3

我刚刚为两个分隔符创建了一个示例，需要对泛型进行一些操作。

CREATE FUNCTION dbo.SplitStrings
(
   @List       NVARCHAR(MAX),
   @Separator1 Varchar(100),
   @Separator2 Varchar(100)
)
RETURNS  TABLE 
AS

   RETURN 
   (  
      SELECT Item = y.i.value('(./text())[1]', 'nvarchar(4000)')
      FROM 
      ( 
        SELECT x = CONVERT(XML, '<i>' 
          + REPLACE(REPLACE(@List, ISNULL(@Separator1,''), '</i><i>') , ISNULL(@Separator2,''), '</i><i>') 
          + '</i>').query('.')
      ) AS a CROSS APPLY x.nodes('i') AS y(i)
   );

GO  

Select * From dbo.SplitStrings ('1,2,3,4 5,6,7',',','-')

如果不需要第二个分隔符，只需传递空或空。