perl -nle '/TABLE;(.*)/?($t=$1):/COLUMN;([^;]*)/&&print(qq{$t.$1})' file1.txt

##</code><code>##

s**lil*;  $*=join'',sort split q**;  s;.*;grr; &&s+(.(.)).+$2$1+; $; =
qq-$_-;s,.*,ahc,;$,.=chop for split q,,,reverse;print for($,,$;,$*,$/)