sql 取漢字首字母

create

function fn_getpy(@str
nvarchar(4000
)) 
returns
nvarchar(4000
) 
--用於加密
--with encryption 
asbegin
declare
@intlen
intdeclare
@strret
nvarchar(4000
) 
declare
@temp
nvarchar(100
) 
set@intlen
=len(@str
) 
set@strret=''
while
@intlen
>
0begin
set@temp=''
select
@temp
=case
when
substring(@str,@intlen,1) >='帀
'then'z
'when
substring(@str,@intlen,1) >='丫
'then'y
'when
substring(@str,@intlen,1) >='夕
'then'x
'when
substring(@str,@intlen,1) >='屲
'then'w
'when
substring(@str,@intlen,1) >='他
'then't
'when
substring(@str,@intlen,1) >='仨
'then's
'when
substring(@str,@intlen,1) >='呥
'then'r
'when
substring(@str,@intlen,1) >='七
'then'q
'when
substring(@str,@intlen,1) >='妑
'then'p
'when
substring(@str,@intlen,1) >='噢
'then'o
'when
substring(@str,@intlen,1) >='拏
'then'n
'when
substring(@str,@intlen,1) >='嘸
'then'm
'when
substring(@str,@intlen,1) >='垃
'then'l
'when
substring(@str,@intlen,1) >='咔
'then'k
'when
substring(@str,@intlen,1) >='丌
'then'j
'when
substring(@str,@intlen,1) >='鉿
'then'h
'when
substring(@str,@intlen,1) >='旮
'then'g
'when
substring(@str,@intlen,1) >='發
'then'f
'when
substring(@str,@intlen,1) >='妸
'then'e
'when
substring(@str,@intlen,1) >='咑
'then'd
'when
substring(@str,@intlen,1) >='嚓
'then'c
'when
substring(@str,@intlen,1) >='八
'then'b
'when
substring(@str,@intlen,1) >='吖
'then'a
'else
rtrim(ltrim(substring(@str,@intlen,1
))) 
end--對於漢字特殊字元，不生成拼音碼 
if (ascii(@temp)>
127) set
@temp=''
--對於英文中小括號，不生成拼音碼 
if@temp='
('or@temp='
)'set@temp=''
select
@strret
=@temp
+@strret
set@intlen
=@intlen-1
endreturn
lower(@strret
) 
end

呼叫方法

select dbo.fn_getpy('

漢字') py

出處：

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