How do I create a candidate key in SQL Server?
Consequently, how do you create a candidate key in SQL?
CANDIDATE KEY is a set of attributes that uniquely identify tuples in a table. Candidate Key is a super key with no repeated attributes. The Primary key should be selected from the candidate keys. Every table must have at least a single candidate key.
Similarly, what is the difference between a candidate key and primary key? Candidate Key – A Candidate Key can be any column or a combination of columns that can qualify as unique key in database. There can be multiple Candidate Keys in one table. Primary Key – A Primary Key is a column or a combination of columns that uniquely identify a record. Only one Candidate Key can be Primary Key.
People also ask, what is a candidate key in SQL Server?
Candidate Key – A candidate key is a column or a set of columns that can qualify as a primary key in the database. There can be multiple candidate keys in a database relation and each candidate can work as a primary key for the table.
Can a candidate key be a composite key?
Candidate Key: A nominee for primary key field is known as candidate key. Composite Key: Creating more than one primary key is jointly known as composite key. Update : A candidate key is a unique key that can be used as a primary key. Composite key is a key of two or more attributes that uniquely identifies the row.