SQL Server中取汉字拼音的函数

本文介绍了一个SQL函数,用于将中文字符串转换为对应的拼音。通过内部定义的转换表,该函数能够识别并转换非汉字字符,保留汉字字符的拼音。

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原文出处: http://www.itphome.cn/html/2013/mssql_0813/2569.html
Create function fun_getPY ( @str nvarchar(4000) ) returns...

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

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