How to delete all comments from MultiSite?

If something is truly urgent, you need to consider hiring someone via jobs.wordpress.net – otherwise you get to wait until a friendly volunteer pops in.

Delete all comments from all sites? You’ll have to do this in the DB.

DELETE from wp_comments WHERE comment_approved = '0';

And you’ll want to run this changing wp_comments for each site, so wp_2_comments and so on.

Want to turn comments OFF for all your sites? https://wpmututorials.com/how-to/close-comments-across-the-network/

Hey,
Will this delete the approved comments also?
Thanks!

No. That’s what WHERE comment_approved = '0' means ?? When your comments are approved, that number changes to 1