If you have the Dataview Plugin installed in your Obsidian Vault, you can use this snippet of code to list all the fields and their value that dataview can see. This helps in programming Dataview queries because it helps you understand the structure of the page.

Put the following in a dataviewjs block

$= dv.span(dv.current())

Here is an example of the result of that code:

tags: [[Obsidian]]