Your question is a bit confusing but I'll give it a try.
If you are talking about the AnyDBM_File package then that just ties a hash to a file.
If the keys in the file are the epoch time of localtime (the value returned in scalar context) and all you want to do is sort by the keys then here is a loop that will sort the keys...

for (sort {$a <=> $b} keys %dbmhash) {
   #do something with the value which is $dbmhash{$_}
}
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Update:
well, i've just read your followup post and I'm still not sure what you are trying to accomplish. I see you opening the dbm file %NEWS but I don't see you trying to do anything with it.