UPDATE catalog_items SET amount = 50 WHERE page_id = 91
If you're using Navicat ofc
Just saying, but it'd work in any MySQL program since its a basic query,
I've never used PhpMyAdmin so wasn't sure haha. I think catalog_items would be catalogue_items instead though, and not sure if the other things are also called amount or page_id exactly but even if they're not I'm sure it's easy enough to change