汉字转拼音首字母

 

Create function [dbo].[fun_getPY](@str nvarchar(4000)) 
returns nvarchar(4000) 
as 
begin 
declare @word nchar(1)
declare @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
go