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語 讌 覲 isnumeric() 襯 螻 . 蠏朱 100% 蟇碁譯朱 蟆 . れ螻 螳 蟆曙磯. (ascii 貊襦 覓語 蟆れ 襦 覦.)
select 
	[ascii code] = str(number) 
,	[ascii character]   = char(number)
,	[isnumeric returns] = isnumeric(char(number)) 
from master.dbo.spt_values 
where type = 'p' 
and number between 0 and 255 
and isnumeric(char(number)) = 1

企至 覃 ? like 企Г豺 伎覃 .
select 
	[ascii code] = str(number) 
,	[ascii character]   = char(number)
,	[isnumeric returns] = case when str(number) like '%[^0-9]%' then 0 else 1 end 
from master.dbo.spt_values 
where type = 'p' 
and number between 0 and 255 
and isnumeric(char(number)) = 1
蠍 蠍郁鍵..
企: : るジ讓曙 襦螻豺 企Ν 譯殊語. 襦螻豺
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磯Μ 襴 螳 螻 覿襴 覃 企 豺蟲螳 螻 企 螳 蠏碁 瑚蟯螻襯 讀ろ. (覿 覈)