- Candidate Key A minimal set of attributes that can uniquely identify a tuple in a relation. Minimal means no proper subset of the candidate key can uniquely identify a tuple. - Super Key A set of attributes that uniquely identifies a tuple. A super key can be formed by adding zero or more attributes to a candidate key. - Relation R (A, B, C) Attributes of the relation. - B is the only candidate key This means {B} is a candidate key, and no other single attribute or combination of attributes (excluding those containing B) can be a candidate key.
Consider a relation R with attributes (A, B, C), where B is the only candidate key. Identify the total number of possible super keys of the relation R. - Question not attempted
Asked in Programmer Exam 2024 · Topic: Basics of Computers and Information Technology (Database Management Systems (DBMS) Basics: Concepts, Types of Databases)
More Information and Communication Technology questions
- The cardinality of a relational table with 5000 rows and 10 columns is - 0 - Question not attempted
- Which operation allows us to find tuples that are in one relation but are not in another relation? - Question not attempted
- Which set of SQL language commands is used to query and update a database? - (5) Question not attempted
- An ER Model describes which type of schema? - (5) Question not attempted
- Consider a relation with attributes {A, B, C, D} and the following functional dependencies: A → B, B → C and C → D. If A is the primary key, which of the following is true regarding BCNF?
- The number of attribute in a relation is known as -
- Which operation requires two relations as input to form a new relation and these two relations must have a common attribute?
- The complete picture of data stored in database is known as
All 1,360 Information and Communication Technology questions →