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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