How to join field form multiform?

Shortcodes and exports don’t provide a join semantic. You an query 2 forms at once by using form="form1,form2 in your shortcode. You can even filter on a field that both of those forms have, but it doesn’t support joining.

If you want to get into the DB, you could create a DB View for each form then you can create a query to join them (or create a view of that join). But those views are not visible to the plugin.

Good Plugin***

I spent several days. It ‘s worth a lot.

Use with Shortcodes Actions and Filters plugin.

Add funtion xxx() in to Shortcodes.

Thank you for your advice.