Ok, thanks all for your help.

A simple DELETE FORM `pun_users` where `num_posts` = 0 works ?

And for banned users a DELETE FORM `pun_users`WHERE `username` IN (SELECT `username` FROM `pun_bans`) ?

No tables linked with this two ? Nothnig more to do ? (I want to be sure...)

Okay, but witch queries ?

Hello,

I have a lot of banned accounts (thanks Askimet smile) and not used (no messages on the forum).

Is there a way to simply delete this accouts ? (With a SQL querie for exemple)

Thanks !