adding fields to listing

[joehark]

I have edited listing.php so the display now includes two new fields (listing number, listing date). They display when the page is reviewed.

But what page do I edit so they same fields are offered in the Edit Post page so data can be entered?

And of course, I know I will need to add the appropriate field to the MySQL - and that has me intimidated. I've learned how to edit data within an existing MySQL dB but not how to add new fields. If someone has the patience to take me though that, step by step, that would be hugely appreciated.

While doing that, may I assume that is the same file where I can edit field labels? The client's agency in a Caribbean nation with many islands, so I need to change the Edit Post field State to Island, City to Township, etc. which I have already done in listing.php but should mirror that in the Edit Post page to avoid confusing the data entry clerk.