What is candidate key key?
- What is candidate key and example?
- What is candidate key class 10th?
- What is a candidate key answer?
- What is candidate key and foreign key?
What is candidate key and example?
Candidate Key: The minimal set of attributes that can uniquely identify a tuple is known as a candidate key. For Example, STUD_NO in STUDENT relation. It is a minimal super key. It is a super key with no repeated data is called a candidate key. The minimal set of attributes that can uniquely identify a record.
What is candidate key class 10th?
Meaning and Definition. It is a non-null and unique key that helps in identifying any record on the table uniquely. One table can only contain a single primary key. It is also a unique type of key that helps in identifying any record on the table uniquely.
What is a candidate key answer?
Candidate Key is a Super Key whose no proper subset is a super key, i.e. suppose if ABC is a candidate key then neither A, B, C or any of its combination can be super key, hence we can say candidate key is a minimal set of attributes of an R( Relational Schema) which can be used to identify a tuple of a table uniquely.
What is candidate key and foreign key?
Candidate Key – is a set of attributes that uniquely identify tuples in a table. Candidate Key is a super key with no repeated attributes. Alternate Key – is a column or group of columns in a table that uniquely identify every row in that table. Foreign Key – is a column that creates a relationship between two tables.
Related Questions
-
Anonymous2 weeks ago
Expert answer2 weeks ago -
Anonymous2 weeks ago
Expert answer2 weeks ago -
Anonymous2 weeks ago
Expert answer2 weeks ago -
Anonymous2 weeks ago
Expert answer2 weeks ago -
Anonymous2 weeks ago
Expert answer2 weeks ago -
Anonymous2 weeks ago
Expert answer2 weeks ago -
Anonymous2 weeks ago
Expert answer2 weeks ago