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sqlserver中软件版本号进行字符串对比比较大小

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Release: 2016-06-07 17:43:28
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sqlserver中软件版本号进行字符串对比比较大小 sql 中直接对 1.2.1.57 1.2.12.57 这样的版本号进行对比是有问题的 需要进行下转换处理 把1.2.1.57 转换为00001000020000100057来进行比较 [fun_split_version] 用于进行转换的 create function [dbo].[fun_spl

sqlserver中软件版本号进行字符串对比比较大小

sql 中直接对 1.2.1.57  1.2.12.57  这样的版本号进行对比是有问题的

需要进行下转换处理

把1.2.1.57 转换为00001000020000100057来进行比较

[fun_split_version]  用于进行转换的
create function [dbo].[fun_split_version]
(
@version varchar(50)--版本号
)
returns decimal(20, 0)
as
begin
-- select [dbo].[fun_split_version]('12312.23344.34234.53441');
--declare @version varchar(50)
--set @version='12.2344.34234.53441'
declare @return decimal(20, 0)
declare @v_1 varchar(20)
declare @v_2 varchar(20)
declare @v_3 varchar(20)
declare @v_4 varchar(20)
declare @wz1 int,@wz2 int ,@wz3 int,@wz4 int
select @wz1=charindex('.',@version),@wz2=charindex('.',@version,CHARINDEX('.',@version)+1)
,@wz3= charindex('.',@version, charindex('.',@version,CHARINDEX('.',@version)+1)+1)

set @v_1=right('0000'+ substring(@version,0,@wz1),5)
set @v_2=right('0000'+ substring(@version,@wz1+1,@wz2-@wz1-1),5)
set @v_3=right('0000'+ substring(@version,@wz2+1,@wz3-@wz2-1),5)
set @v_4=right('0000'+ substring(@version,@wz3+1,len(@version)-@wz3),5)

-- select @v_1,@v_2,@v_3,@v_4

set @return=convert( decimal(20, 0) ,@v_1+@v_2+@v_3+@v_4)
return @return
end

 

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