sql取拼音首字母的方法

最新推荐文章于 2019-05-08 02:08:31 发布

转载最新推荐文章于 2019-05-08 02:08:31 发布 · 1.1k 阅读

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本文介绍了一种通过SQL函数实现汉字到拼音转换的方法，利用Unicode编码和预定义的拼音映射表，确保准确地将汉字字符转换为对应的拼音。

ALTER FUNCTION [dbo].[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