Hello,
I have question: how can I delete K2 Articles and Categories from database? And I want also the article ID restart with 1. I don't want the extra fields & group be deleted.
I have about 2000 items, and when I try to click on "Delete" button, it gives me error (I think error is because they are too much?!), so the process *one a time* is too much long.

Thank you,
Andrea

I would recommend not deleting these items from the DB if you are not comfortable my coding.

Furthermore you can batch select items (up to 100) and delete them.

If you want to start over why don't you uninstall K2 (it WILL DELETE ALL your data) and reinstall it? You can also backup the extrafield tables and reinstate them after the new install.

PS. Always backup before performing any of these actions.