关于中文字符UNICODE编码的三个问题(基于此可以求中文字符的笔划和首拼)

问题一:怎么知道中文字符的UNICODE编码是从19968到40870的

select code=identity(int,1,1) into #t from
(select top 100 a=1 from syscolumns) as a,
(select top 100 a=1 from syscolumns) as b,
(select top 10 a=1 from syscolumns) as c

--得到1-100000的连续自然数

select nchar(code),code from #t order by code
--可以发现,中文字符就是UNICODE编码从19968到40870

知道了以后,就可以直接这么写了,得到所有汉字及对应unicode码
select top 20902 code=identity(int,19968,1) into #t from
(select top 165 a=1 from syscolumns) as a,
(select top 165 a=1 from syscolumns) as b
--得到所有汉字

select nchar(code),code
from #t

问题二:
怎么知道按照笔划排序中文是
‘一’,‘丁’,‘万’等是一笔,两笔,三笔的第一个的

select nchar(code),code
from #t
order by nchar(code) COLLATE Chinese_PRC_Stroke_ci_as
就可以看出来,同笔划的汉字,是按unicode码排列的。
如是:

declare @s nvarchar(100)
declare @n int

set @s = ''
set @n = 9999999

select @s = case when @n > code then @s+chn else @s end,
@n = code from (
select top 21000 chn=nchar(code),code
from #t
order by nchar(code) COLLATE Chinese_PRC_Stroke_ci_as) as a

select @s
--一丁万不且丞丣並临丵乾亁亂僊僵亸償儭儳儶儷亹儽儾
--囔圞灥囖爨厵灩灪爩齾齉靐

问题三:
怎么知道按照拼音排序中文是
‘吖’‘八’‘嚓’等是A,B,C发音的第一个的

我是一个个找的:
select chn=nchar(code),code from #t
order by nchar(code) COLLATE Chinese_PRC_CI_AS

从原理来讲,可以根据j9988老总已有的求首拼码的函数得出来:
http://expert.csdn.net/Expert/topic/1266/1266960.xml?temp=.2896234
select chn=min(nchar(code)),singlepy=dbo.getfirstpy(nchar(code))
from #t
where dbo.getfirstpy(nchar(code)) <> ''
group by dbo.getfirstpy(nchar(code))
order by dbo.getfirstpy(nchar(code))

新版本:
http://expert.csdn.net/Expert/topic/1295/1295209.xml?

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