sqlserver取汉字的首字母的函数

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

（编辑：李大同）

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