使用字母数字条目对VARCHAR列进行排序

时间:2013-05-31 16:47:41

标签: sql sql-server sorting alphanumeric

我使用的是SQL Server,该列是VARCHAR(50),我希望对其进行排序:

1A        
1B        
2        
2        
3        
4A        
4B        
4C        
5A        
5B        
5C        
5N        
14 Draft        
21        
22A        
22B        
23A        
23B        
23C        
23D        
23E        
25        
26        
FR01584        
MISC

到目前为止我所拥有的是:

Select *
From viewASD
ORDER BY 
    Case When IsNumeric(LEFT(asdNumNew,1)) = 1 
         Then CASE When IsNumeric(asdNumNew) = 1 
                   Then Right(Replicate('0',20) + asdNumNew + '0', 20)
                   Else Right(Replicate('0',20) + asdNumNew, 20) 
              END
         When IsNumeric(LEFT(asdNumNew,1)) = 0 
         Then Left(asdNumNew + Replicate('',21), 20)
    End

但是这个SQL语句将' 14草案'在' 26'之后。

有人可以帮忙吗?感谢

4 个答案:

答案 0 :(得分:3)

您的WHERE语句是......奇怪的复杂。

看起来您希望按整数顺序排序任何前导数字,然后按余数排序。如果是这样,你应该把它作为单独的条款,而不是试图一个一个。您遇到的具体问题是您只允许使用一位数字,而不是两位或更多。 (还有No such thing as two。)

这是您的修复,以及SQLFiddle,为您的ORDER BY使用两个单独的计算列测试。 (请注意,这假定asdNumNew的数字部分适合T-SQL int。如果不是,则需要调整CAST和第一个ELSE的最大值。)

SELECT * FROM viewASD
ORDER BY 
CASE 
  WHEN ISNUMERIC(asdNumNew)=1 
  THEN CAST(asdNumNew as int)

  WHEN PATINDEX('%[^0-9]%',asdNumNew) > 1 
  THEN CAST(
    LEFT(
      asdNumNew,
      PATINDEX('%[^0-9]%',asdNumNew) - 1
    ) as int)

  ELSE 2147483648
END, 


CASE 
  WHEN ISNUMERIC(asdNumNew)=1 
  THEN NULL

  WHEN PATINDEX('%[^0-9]%',asdNumNew) > 1 
  THEN SUBSTRING(
      asdNumNew,
      PATINDEX('%[^0-9]%',asdNumNew) ,
      50
    ) 

  ELSE asdNumNew
END

答案 1 :(得分:0)

如果字符串中的所有数字都相当小,请说不超过 10位数, 您可以将字符串中的所有数字扩展为完全 10位数:

123A - > 0000000123A

 S4 -> S0000000004

A3B89 - > A0000000003B0000000089

依此类推,然后对它们进行排序

-- Expand all numbers within S by zeros to be MaxLen
create function [dbo].ExpandNumbers(@S VarChar(4000), @maxlen integer) returns VarChar(4000)
as
begin
  declare @result VarChar(4000);
  declare @buffer VarChar(4000);
  declare @Ch Char;

  declare @i integer;

  set @buffer = '';
  set @result = '';
  set @i = 1;

  while (@i <= len(@S))
    begin
      set @Ch = substring(@S, @i, 1);


      if ((@Ch >= '0') and (@Ch <= '9')) 
        set @buffer = @buffer + @Ch
      else 
        begin
          if (len(@buffer) > 0) 
            set @result = @result + right(replicate('0', @maxlen) + @buffer, @maxlen);

          set @buffer = '';  
          set @result = @result + @Ch;
        end;

      set @i = @i + 1;  
    end;

  if (len(@buffer) > 0) 
    set @result = @result + right(replicate('0', @maxlen) + @buffer, @maxlen);

  return @result;
end;

-- Final query is

   select *
    from viewASD
order by [dbo].ExpandNumbers(asdNumNew)

答案 2 :(得分:0)

尝试这个
声明@t table(Number nvarchar(20))     插入@t     选择     &#39; L010&#39;     联盟所有选择     &#39; L011&#39;     联盟所有选择     &#39; L011&#39;     联盟所有选择     &#39; L001&#39;     联盟所有选择     &#39; L012&#39;     联盟所有选择       &#39; 18&#39;
        联盟所有选择       &#39; 8&#39;       联盟所有选择       &#39; 17&#39;

  union all select  'B004'    
union all SELECT 'B006'    
union all SELECT 'B008'
union all SELECT 'B018'   
union all SELECT 'UG001'
union all SELECT 'UG011'   
union all SELECT 'G001'    
union all SELECT  'G002' 
 union all SELECT 'G011'     





select * from @t 
order by cast(SUBSTRING(Number, 1, 
case when patindex('%[^0-9]%',Number) > 0 then patindex('%[^0-9]%',Number) - 1 else LEN(Number) end) as int), Number
  

<强> O / P

**Number**
B004
B006
B008
B018
G001
G002
G011
L001
L010
L011
L011
L012
UG001
UG011
8
17
18

答案 3 :(得分:0)

我有类似的东西,但有破折号作为主角和尾随空格的可能性。这段代码对我有用。

SELECT 
    my_column,
    PATINDEX('%[^0-9]%',my_column) AS first_alpha_position,
    CONVERT(INT,
    CASE 
        WHEN PATINDEX('%[^0-9]%',my_column) = 0 OR PATINDEX('-%',my_column) = 1
            THEN ABS(my_column)
        ELSE SUBSTRING(my_column,1,PATINDEX('%[^0-9]%',my_column) -1)
    END) AS numeric_value,
    LTRIM(
        SUBSTRING(my_column,PATINDEX('%[^0-9]%',my_column),LEN(my_column)-PATINDEX('%[^0-9]%',my_column)+1)
) AS alpha_chars
FROM my_table
ORDER BY numeric_value,alpha_chars