sql獲取漢字的拼音首字母

/*創建取拼音首字母函數*/ 
create function [dbo].[fn_ChineseToSpell](@strChinese varchar(500)='') 
returns varchar(500) 
as 
begin /*函數實現開始*/ 
     declare @strLen int,@return varchar(500),@i int 
     declare @n int,@c char(1),@chn nchar(1)  
     select @strLen=len(@strChinese),@return='',@i=0 
     while @i<@strLen 
     begin /*while循環開始*/
             select @i=@i+1,@n=63,@chn=substring(@strChinese,@i,1) 
             if @chn>'z'/*原理:“字符串排序以及ASCII碼表”*/                
                 select @n = @n +1,@c =case chn when @chn then char(@n) else @c end from(select top 27 * from (select chn = '吖' union all select '八' union all select '嚓' union all select '咑' union all select '妸'  union all select '發'  union all select '旮'  union all select '鉿'  union all select '丌' /*because have no 'i'*/ union all select '丌' union all select '咔' union all select '垃' union all select '嘸' union all select '拏' union all select '噢' union all select '妑' union all select '七' union all select '呥' union all select '仨' union all select '他' union all select '屲' /*no 'u'*/ union all select '屲' /*no 'v'*/ union all select '屲' union all select '夕' union all select '丫' union all select '帀' union all select @chn) as a  order by chn COLLATE Chinese_PRC_CI_AS ) as b  
             else
                 set @c=@chn
             set @return=@return+@c  
     end /*while循環結束*/  
     return(@return)  
end /*函數實現結束*/

使用方式：
select dbo.[fn_ChineseToSpell]('吳繽')