SQL中将汉字转换成拼音，可以用在助记码的录入

create function fun_getPY(@str nvarchar(4000)) 
returns nvarchar(4000) 
as
begin
declare @word nchar(1),@PY nvarchar(4000) 
set @PY=''
while len(@str)>0 
begin
set @word=left(@str,1) 
--如果非汉字字符，返回原字符 
set @PY=@PY+(case when unicode(@word) between 19968 and 19968+20901 
then (select top 1 PY from ( 
select 'A' as PY,N'驁' as word 
union all select 'B',N'簿'
union all select 'C',N'錯'
union all select 'D',N'鵽'
union all select 'E',N'樲'
union all select 'F',N'鰒'
union all select 'G',N'腂'
union all select 'H',N'夻'
union all select 'J',N'攈'
union all select 'K',N'穒'
union all select 'L',N'鱳'
union all select 'M',N'旀'
union all select 'N',N'桛'
union all select 'O',N'漚'
union all select 'P',N'曝'
union all select 'Q',N'囕'
union all select 'R',N'鶸'
union all select 'S',N'蜶'
union all select 'T',N'籜'
union all select 'W',N'鶩'
union all select 'X',N'鑂'
union all select 'Y',N'韻'
union all select 'Z',N'咗'
) T  
where word>=@word collate Chinese_PRC_CS_AS_KS_WS  
order by PY ASC) else @word end) 
set @str=right(@str,len(@str)-1) 
end
return @PY 
end

--函数调用实例：
select dbo.fun_getPY('周凡')