Question

我有一个包含

的数据的表格

Item No. (1a)
Item No. (2)
Item No. (3)
Item No. (4)
Item No. (5)
Item No. (6)
Item No. (7)
Item No. (8)
Item No. (9)
Item No. (10)

现在假设这些并不总是按照这个完美的顺序，我希望这样当我选择它们时，它们会按顺序拉出来。但是，当我选择并尝试按任何顺序排序时，它会给我这个

Item No. (1a)
Item No. (10)
Item No. (2)
Item No. (3)
Item No. (4)
Item No. (5)
Item No. (6)
Item No. (7)
Item No. (8)
Item No. (9)

任何人都可以通过语句帮助我按顺序设置第一个订单吗？

Answer 1

您可以使用模式拆分器来拆分字符串的数字组件。这是来自Dwain Camps＆＃39; article

-- PatternSplitCM will split a string based on a pattern of the form 
-- supported by LIKE and PATINDEX 
-- 
-- Created by: Chris Morris 12-Oct-2012 
CREATE FUNCTION [dbo].[PatternSplitCM]
(
       @List                VARCHAR(8000) = NULL
       ,@Pattern            VARCHAR(50)
) RETURNS TABLE WITH SCHEMABINDING 
AS 

RETURN
    WITH numbers AS (
      SELECT TOP(ISNULL(DATALENGTH(@List), 0))
       n = ROW_NUMBER() OVER(ORDER BY (SELECT NULL))
      FROM
      (VALUES (0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) d (n),
      (VALUES (0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) e (n),
      (VALUES (0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) f (n),
      (VALUES (0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) g (n))

    SELECT
      ItemNumber = ROW_NUMBER() OVER(ORDER BY MIN(n)),
      Item = SUBSTRING(@List,MIN(n),1+MAX(n)-MIN(n)),
      [Matched]
     FROM (
      SELECT n, y.[Matched], Grouper = n - ROW_NUMBER() OVER(ORDER BY y.[Matched],n)
      FROM numbers
      CROSS APPLY (
          SELECT [Matched] = CASE WHEN SUBSTRING(@List,n,1) LIKE @Pattern THEN 1 ELSE 0 END
      ) y
     ) d
     GROUP BY [Matched], Grouper

现在您已经拥有了拆分器，您可以使用它来对数据进行排序：

SELECT t.val
FROM tbl t
CROSS APPLY (
    SELECT TOP 1 CAST(Item AS INT)
    FROM dbo.PatternSplitCM(t.val, '%[0-9]%')
    WHERE Matched = 1
    ORDER BY ItemNumber
)s(n)
ORDER BY s.n

SQL Fiddle

Answer 2

with cte as(
select '1a' as num
union select '2'
union select '3'
union select '4'
union select '5'
union select '6'
union select '7'
union select '8'
union select '9'
union select '10') select num from cte order by case when ISNUMERIC(num) = 0 then 0 else convert(int,num) end asc

诀窍是按isnumeric（num）= 0的情况顺序，然后0，否则转换（int，num）结束asc。

排序字母数字值

2 个答案: