sql server汉字拼音首字母生成函数

最新推荐文章于 2023-09-02 15:24:46 发布

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本文介绍了一个SQL函数fn_GetPySzm，该函数用于将输入的汉字字符串转换为相应的拼音字符串。通过使用CASE WHEN语句和一系列预定义的汉字与拼音对应关系，此函数能够逐个字符地处理输入字符串，并返回其拼音形式。特别地，对于非汉字字符，函数会直接返回原字符。

Create Function [fn_GetPySzm](@str nvarchar(4000))
returns nvarchar(4000)
with encryption 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’ PY, N’驁’ 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 UPPER(@PY)
end