汉字转换成拼音字头

SQL函数实现拼音转换

最新推荐文章于 2022-02-23 15:02:25 发布

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本文介绍了一个SQL Server函数，该函数能够将输入的中文字符串转换为对应的汉语拼音缩写形式。此函数通过逐字符解析并匹配预设的汉字与拼音对照表来实现，支持全角及半角字符，并能处理简单的希腊字母。

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER function [dbo].[fun_getPY](@str nvarchar(4000))
returns nvarchar(4000)
as
begin
declare @word nvarchar(1),@PY nvarchar(4000)
set @PY=''
set @str = ltrim(rtrim(@str))
while len(@str)>0
begin
set @word=left(@str,1)

set @PY=@PY+ltrim((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)
when unicode(@word) between 8544 and 8552 --希腊字母1-9
then nchar(unicode(@word)-8495)
when unicode(@word) = 8553 --希腊字母10
then '0'
when unicode(@word) between 48 and 57   --数字0-9
then @word
when unicode(@word) between 65296 and 65305   --全角数字0-9
then nchar(unicode(@word)-65248)
when unicode(upper(@word)) between 65 and 90   --字母a-z和A-Z
then upper(@word)
when unicode(upper(@word)) between 65313 and 65338 --全角字母a-z和A-Z
then nchar(unicode(upper(@word))-65248)
else '' end))   --如果非汉字字符或非字母、数字、希腊字母、全角字母、全角数字，返回空字符
--set @str=right(@str,len(@str)-1)
set @str = substring(@str,2,len(@str)-1)
end
return @PY
end