Unlock the secrets of Candidate Keys in DBMS! Discover how they ensure database integrity & boost your data management skills. Read now!
If the database engineer attaches a candidate key to the table composed of arbitrary alphanumerical input, that candidate key will do the same thing that the time and terminal super key attribute combination does, with just one column. With all of this in mind, the use of a candidate key c...
Every candidate key is a super key but, every super key may or may not be a candidate key. There many other distinguishing factors between super key and candidate key, which I have briefly discussed in the comparison chart below.
{Roll_no, Registration_no}:This key cannot be considered as a candidate key because when we take the subset of this key we get two attributes i.e Roll_no or Registration_no. Each of these attributes is the candidate key. So, it is not a minimal super key. Hence, this key is not ...