Sometimes you need to update values incrementally in your WordPress database. You might for example have an upvote feature to which you automatically add points in an incremental fashion.
It was surprisingly hard to find examples of how to do this using Wpdb. But here’s an example of doing just that:
/* Have to use wpdb->query instead of wpdb->update because the latter assumes strings */ $results = $wpdb->query($wpdb->prepare("UPDATE foodsenglish SET popularity = popularity + 1 WHERE dbID = %d", $foodIdToSendThePointFor), ARRAY_A);