Example:Key {name,beersLiked}is a key because neither {name}nor {beersLiked}is a superkey. name doesn't->manf;beersLiked doesn't->addr. There are no other keys,but lots of superkeys. Any superset of {name,beersLiked). 1212 Example: Key z {name, beersLiked} is a key because neither {name} nor {beersLiked} is a superkey. – name doesn’t -> manf; beersLiked doesn’t -> addr. z There are no other keys, but lots of superkeys. – Any superset of {name, beersLiked}