关于sql中字符串中取数字问题

create procedure GetNumFromString

@str varchar(100)

as

declare @i int

declare @len int

declare @str1 varchar(100)

set @str1=''

set @len=len(@str)

set @i=1

while @i<=@len

begin

if isnumeric(substring(@str,@i,1))>0

begin

set @str1=@str1+substring(@str,@i,1)

end

else

begin

set @str1=@str1+','

end

set @i=@i+1

end

select replace(@str1,',',' ')

GO
或者

declare @str varchar(100),@tmp varchar(101),@i int

set @str='sddfd123fddfd56fddf78'

set @tmp=@str+'a'

while patindex('%[0-9]%',@tmp)>0

begin

set @i=1

while 1=1

begin

if isnumeric(substring(@tmp,patindex('%[0-9]%',@tmp)+@i,1))=0 break

set @i=@i+1

end

print substring(@tmp,patindex('%[0-9]%',@tmp),@i)

set @tmp=stuff(@tmp,patindex('%[0-9]%',@tmp),@i,'')

end