Joker character to allow everyone in a SQL table

[via.lej at free.fr]

Hello all !

I'm using a FreeRadius server 1.1.3. It is configured to use a SQL table (which
contains some mac addresses to allow user to access to the network or not). This
night the SQL table has flushed. Is there some joker characters I can put in the
SQL table to allow everyone while I build up the table again ? Or any other way
to do that ?

Regards,
Dav