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8. Statement 1: A tuple is a row in a relation
Statement 2: Existence of multiple foreign keys in the same relation is possible
Statement 2: Existence of multiple foreign keys in the same relation is possible
- a)Both the statements are true.
- b)Statement 1 is correct but statement 2 is false.
- c)Statement 1 is false but statement 2 is correct.
- d)Both the statements are false.
Correct answer is option 'A'. Can you explain this answer?
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8. Statement 1: A tuple is a row in a relationStatement 2: Existence o...
A tuple is a row is a relation. There can exist multiple foreign keys in the same relation because there can exist multiple attributes in the relation that are primary keys in two or more other relations.
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8. Statement 1: A tuple is a row in a relationStatement 2: Existence o...
Statement 1: A tuple is a row in a relation
A tuple is a fundamental concept in relational database management systems (RDBMS). It represents a single record or row in a relation. In other words, a tuple is an instance or occurrence of a relation. Each tuple consists of a set of attributes or fields that describe the characteristics or properties of the entity being represented.
For example, consider a relation called "Students" which represents information about students in a school. Each tuple in the "Students" relation would represent a specific student and contain attributes such as student ID, name, age, and grade.
Therefore, Statement 1 is true. A tuple is indeed a row in a relation.
Statement 2: Existence of multiple foreign keys in the same relation is possible
In a relational database, a foreign key is a field or set of fields in a table that refers to the primary key of another table. It establishes a relationship between two tables, allowing data to be linked or connected between them.
It is possible for a relation to have multiple foreign keys. This occurs when there are multiple relationships between the same two tables or when a table has relationships with multiple other tables. In such cases, each foreign key represents a different relationship or connection.
For example, let's consider a scenario where we have two tables: "Employees" and "Departments". The "Employees" table has two foreign keys: "DepartmentID" and "ManagerID". The "DepartmentID" foreign key establishes a relationship between the "Employees" table and the "Departments" table based on the department each employee belongs to. The "ManagerID" foreign key establishes a relationship within the "Employees" table itself, indicating the manager of each employee.
Therefore, Statement 2 is also true. The existence of multiple foreign keys in the same relation is possible.
Conclusion
Both Statement 1 and Statement 2 are true. A tuple is a row in a relation, and it is possible to have multiple foreign keys in the same relation.
A tuple is a fundamental concept in relational database management systems (RDBMS). It represents a single record or row in a relation. In other words, a tuple is an instance or occurrence of a relation. Each tuple consists of a set of attributes or fields that describe the characteristics or properties of the entity being represented.
For example, consider a relation called "Students" which represents information about students in a school. Each tuple in the "Students" relation would represent a specific student and contain attributes such as student ID, name, age, and grade.
Therefore, Statement 1 is true. A tuple is indeed a row in a relation.
Statement 2: Existence of multiple foreign keys in the same relation is possible
In a relational database, a foreign key is a field or set of fields in a table that refers to the primary key of another table. It establishes a relationship between two tables, allowing data to be linked or connected between them.
It is possible for a relation to have multiple foreign keys. This occurs when there are multiple relationships between the same two tables or when a table has relationships with multiple other tables. In such cases, each foreign key represents a different relationship or connection.
For example, let's consider a scenario where we have two tables: "Employees" and "Departments". The "Employees" table has two foreign keys: "DepartmentID" and "ManagerID". The "DepartmentID" foreign key establishes a relationship between the "Employees" table and the "Departments" table based on the department each employee belongs to. The "ManagerID" foreign key establishes a relationship within the "Employees" table itself, indicating the manager of each employee.
Therefore, Statement 2 is also true. The existence of multiple foreign keys in the same relation is possible.
Conclusion
Both Statement 1 and Statement 2 are true. A tuple is a row in a relation, and it is possible to have multiple foreign keys in the same relation.
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8. Statement 1: A tuple is a row in a relationStatement 2: Existence of multiple foreign keys in the same relation is possiblea)Both the statements are true.b)Statement 1 is correct but statement 2 is false.c)Statement 1 is false but statement 2 is correct.d)Both the statements are false.Correct answer is option 'A'. Can you explain this answer?
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