Differentiate between candidate key and super key

From: Low Yew Sing <slasher_at_singnet.com.sg>
Date: 2000/03/02
Message-ID: <89m0im$hu7$1_at_violet.singnet.com.sg>#1/1

How to differentiate between a candidate key and a super key? i can;t understand what my txtbk is trying to say? Anybody can help? If possible, quote examples.
Thanks
Low Yew Sing Received on Thu Mar 02 2000 - 00:00:00 CET

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