Have you had a ton of posts that contain data on your custom fields? For any reason, you may want to rename one of the fields without having an effect on existing data. In this post, we'll show you two ways to update your field ID without losing data. Let’s see how!
Now, you know what custom fields is and in the previous post, we stopped in the step “WordPress calls the
update_metadata function to store data from custom fields in the database”. In this post, we’ll follow up that flow to figure out how WordPress organizes the database.