I have a bad habit of trolling and a number of my questions have been deleted. Is there any way I can go back and look at them? Can I use the data explorer and write a query to see them?
Deleted posts are omitted from the data dump, so they won't appear on SEDE. If you really wanted, you could pull old data dumps that were released after your question was asked but before it was deleted, and search those. Closed questions appear in the data dump, but they also appear publicly on the site; you can just see them in your profile normally