取得汉字字符串的拼音首字母的mssql函数

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本文介绍了一个SQL Server存储过程，该过程用于提取输入字符串中每个汉字的拼音首字母，并组合成一个新的字符串返回。此方法对于创建基于拼音首字母的索引或排序非常有用。

drop function fun_getPY
go
SET QUOTED_IDENTIFIER ON
go
SET ANSI_NULLS ON
go
----取汉字拼音首字母的存储过程
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
go
IF OBJECT_ID('dbo.fun_getPY') IS NOT NULL
PRINT '<<< CREATED FUNCTION dbo.fun_getPY >>>'
ELSE
PRINT '<<< FAILED CREATING FUNCTION dbo.fun_getPY >>>'
go
SET ANSI_NULLS OFF
go
SET QUOTED_IDENTIFIER OFF
go

调用
select dbo.fun_getpy('深蓝')

返回 : SL