【叶子函数分享十】将数字转换千分位分隔形式

--创建函数(原创：dobear_0922)

create function [dbo].[getformatstring](@dec decimal(28,8), @n int)

returns varchar(32) as

begin

    declare @str varchar(32), @len int, @left varchar(32), @right varchar(32),@end varchar(32)

    if @n!='0'

    begin

       set @str= round(@dec,@n)

       select @left=left(@str,charindex('.',@str)-1),@len=len(@left)-2

       while @len>1

       begin

           select @left=stuff(@left,@len,0,','), @len=@len-3

       end

       select @right=left(stuff(@str,1,charindex('.',@str),''), @n),@len=4

       while @len <=len(@right)

       begin

           select @right=stuff(@right,@len,0,','), @len=@len+4

       end

       set @end= @left+'.'+@right

    end

    else

    begin

       set @str= round(@dec,@n)

       select @left=left(@str,charindex('.',@str)-1),@len=len(@left)-2

       while @len>1

       begin

           select @left=stuff(@left,@len,0,','), @len=@len-3

       end

       select @right=left(stuff(@str,1,charindex('.',@str),''), @n),@len=4

       while @len <=len(@right)

       begin

           select @right=stuff(@right,@len,0,','), @len=@len+4

       end

       set @end= @left

    end

    return @end

end

 

--测试示例

select [dbo].[getformatstring](2645433,2)

 

--运行结果

/*

2,645,433.00

*/

 

--如果小数点后面不需要处理的话，我们可以不用函数直接：

select convert(varchar, convert(money, 2645433), 1)

/*

2,645,433.00

*/