Вы можете использовать:
RewriteEngine on
# external redirect from actual URL to pretty one
RewriteCond %{THE_REQUEST} \s/+FOLDER/index\.php\?id=(\d+) [NC]
RewriteRule ^ /FOLDER/%1? [R=301,L,NE]
# internal forward from pretty URL to actual one
RewriteRule ^FOLDER/(\d+)/?$ FOLDER/index.php?id=$1 [L,QSA,NC]
Самый ранний и последний срок?
Select meme_altid, Min(meme_eff) As eff, Max(meme_trm) As term From #tbl
Group By meme_altid