SQL Query in profile tab

[TriggerHappy123]

I made a plugin to add a new tab to a users profile, how would i make the data thats shown in the tab be from an executed MySQL Query?

PHP Code:

class vB_ProfileBlock_MyModification extends vB_ProfileBlock
{
    var $template_name = 'memberinfo_block_mymodification';

    function confirm_empty_wrap()
    {
        return false;
    }

    function confirm_display()
    {
        return ($this->block_data['mymodification'] != '');
    }

    function prepare_output($id = '', $options = array())
    {
        $this->block_data['mymodification'] = 'QUERY HERE'; // what would i do here
    }
}