一个排序的问题,不知道要从何入手解决。
select code from tb order by code
--1)創建函數
CREATE function [dbo].[GetSplitOfIndex]
(
@String nvarchar(max),--要分割的字符串
@split nvarchar(10),--分隔符号
@index int--取第几个元素
)
returns nvarchar(1024)
--returns int
as
begin
declare @location int--标记所在位置
declare @start int--标记查找开始位置
declare @next int--
declare @seed int--标记长度
set @String=ltrim(rtrim(@String))--去掉前后空格
set @start=1
set @next=1
set @seed=len(@split)--标记长度赋值
set @location=charindex(@split,@String)
while @location<>0 and @index>@next--在检索完整个字符串或者检测到所选字符串时结束循环
begin
set @start=@location+@seed
set @location=charindex(@split,@String,@start)
set @next=@next+1
END
return
CASE
WHEN CHARINDEX(@split,@String)>0 AND @location =0 THEN ''
WHEN CHARINDEX(@split,@String)=0 AND @location =0 THEN @String
ELSE substring(@String,@start,@location-@start)
end
end
go
--2)執行查詢
;WITH a1 (cstr) AS
(
select '1' UNION ALL
select '1-1' UNION ALL
select '1-1-1' UNION ALL
select '1-2' UNION ALL
select '1-3' UNION ALL
select '1-11' UNION ALL
select '1-20' UNION ALL
select '2' UNION ALL
select '2-1' UNION ALL
select '2-1-1' UNION ALL
select '2-2' UNION ALL
select '2-3' UNION ALL
select '2-20'
)
SELECT * FROM a1
order by
cast(dbo.GetSplitOfIndex(cstr+'-','-',1) AS int)
,cast(dbo.GetSplitOfIndex(cstr+'-','-',2) AS int)
,cast(dbo.GetSplitOfIndex(cstr+'-','-',3) AS int)