create  function fun_getPY (    @str nvarchar(4000) )returns nvarchar(4000)asbegin  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 @PYend