I am creating a database table with phpMyAdmin. For each column you have the option of labeling them "Primary" "Index" and "Unique". From reading the MySQL manual, a primary key is a unique key that can't be null. A unique key can have only distinct values. So if I have a column, and I designate it primary, unique, and index, does that mean that I am being redundant. If I label a column Primary, does it still get indexed? Just need some clarification. Thanks.