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转自：http://www.cnblogs.com/zhuisuo/archive/2011/01/12/1933842.html
create function [dbo].[fn_getpy]
(@str nvarchar(4000))
returns nvarchar(4000)
as
begin
declare @str_len int,@result nvarchar(4000) ,@crs nvarchar(1)
set @str_len=len(@str)
set @result= ' '
while @str_len> 0
begin
set @crs=substring(@str,@str_len,1)
select @str_len=@str_len-1,@result=
case
when @crs>='帀' then 'Z'
when @crs>='丫' then 'Y'
when @crs>='夕' then 'X'
when @crs>='屲' then 'W'
when @crs>='他' then 'T'
when @crs>='仨' then 'S'
when @crs>='呥' then 'R'
when @crs>='七' then 'Q'
when @crs>='妑' then 'P'
when @crs>='噢' then 'O'
when @crs>='拏' then 'N'
when @crs>='嘸' then 'M'
when @crs>='垃' then 'L'
when @crs>='咔' then 'K'
when @crs>='丌' then 'J'
when @crs>='铪' then 'H'
when @crs>='旮' then 'G'
when @crs>='发' then 'F'
when @crs>='妸' then 'E'
when @crs>='咑' then 'D'
when @crs>='嚓' then 'C'
when @crs>='八' then 'B'
when @crs>='吖' then 'A'
else @crs end+@result
end
return(@result)
end
