SQL获取汉字拼音的打头字母

  create   function   f_GetPy(@Str   nvarchar(400))   
  returns   nvarchar(4000)   
  as   
  begin   
  declare   @strlen   int,@re   nvarchar(4000)   
  declare   @t   table(chr   nchar(1)   collate   Chinese_PRC_CI_AS,letter   nchar(1))   
  insert   @t   select   '吖','A'   union   all   select   '八','B'   
  union   all   select   '嚓','C'   union   all   select   '咑','D'   
  union   all   select   '妸','E'   union   all   select   '发','F'   
  union   all   select   '旮','G'   union   all   select   '铪','H'   
  union   all   select   '丌','J'   union   all   select   '咔','K'     
  union   all   select   '垃','L'   union   all   select   '嘸','M'   
  union   all   select   '拏','N'   union   all   select   '噢','O'   
  union   all   select   '妑','P'   union   all   select   '七','Q'   
  union   all   select   '呥','R'   union   all   select   '仨','S'   
  union   all   select   '他','T'   union   all   select   '屲','W'   
  union   all   select   '夕','X'   union   all   select   '丫','Y'   
  union   all   select   '帀','Z'   
    
  select   @strlen=len(@str),@re=''   
  while   @strlen>0   
  begin   
  select   top   1   @re=letter+@re,@strlen=@strlen-1   
  from   @t   a   where   chr<=substring(@str,@strlen,1)   
  order   by   chr   desc   
  if   @@rowcount=0   
  select   @re=substring(@str,@strlen,1)+@re,@strlen=@strlen-1   
  end   
  return(@re)   
  end 

 
调用方法
print dbo.f_GetPy('打算送到根深蒂固')