Michael Simpson

Yes, look under CMDB Options, Saving

I think the issues is that your version of the plugin is outdated and this line is not compatible with more recent versions of PHP. Check that you have version 2.10.37. If not download from GitHub: https://github.com/mdsimpson/contact-form-7-to-database-extension/releases

I think you might need to code it this way:

require_once(ABSPATH . 'wp-content/plugins/contact-form-7-to-database-extension/CFDBFormIterator.php');

$exp = new CFDBFormIterator();
$exp->export('Table1', $atts);
while ($row = $exp->nextRow()) {
    $exp2 = new CFDBFormIterator();
    $exp2->export('Table2', $atts);
    while ($row2 = $exp2->nextRow()) {
        if ($row2['id'] === $row['id']){
            printf('%s', $row2['quantity']);
        }
    }
}

CFDB does not handle email. That is handled by the form plugin.

The table does not / should not have a primary key

Try uninstalling CFDB and re-install from a download from https://github.com/mdsimpson/contact-form-7-to-database-extension/releases

If you downloaded it from the main GitHub page, it puts the plugin in a directory of a different name then the editor cannot see it.

My mistake, I thought this was referring to one of my other plugins.

I am not actively adding to this plugin (Add Shotcodes Actions and Filters) but I will address problems if they arise.

Latest versions are now on GitHub. See https://cfdbplugin.com/

That editor extension is a not-free extension of CFDB that adds editing capability. Updated to that are here: https://cfdbplugin.com/?page_id=939

The plugin updates are now available GitHub instead of WordPress.com
Be sure to install the GitHub updater plugin as well.
See: https://cfdbplugin.com/

Unfortunately no. You will have to manually create it.

https://cfdbplugin.com/?page_id=680

Uninstall CFDB and install it form a prepared release distro: https://github.com/mdsimpson/contact-form-7-to-database-extension/releases

Fix added in latest version
https://github.com/mdsimpson/contact-form-7-to-database-extension/releases/tag/2.10.36

Given that you have a shortcode, in its PHP code, you can call another shortcode like this:

do_shortcode('[some_other_shortcode]');