Comments panel use

I need to map a property with insert query 2 but I don’t understand the doc extract below:

Insert Query 2: INSERT INTO ItemNotes (AccountId, NoteId) VALUES (YOURID, %d)

This query is optional and will insert the note id from Insert Query 1 into a mapping table of your choice. You must replace YOURID with something meaningful for your mapping table. This is most commonly done by binding this query to an expression. The reason for this second query is to have a mapping table to be joined to the note table to filter out which notes belong to a particular Comment Panel component.

I don’t understand how to bind YOURID to anything

Can you give me an example ?