All attribute combinations inside a relation that can serve as primary key are known as
Candidate Key
Alternate Key
Foreign Key
None of these
Name the data model in which all the tables are linked with each other using a common attribute in the tables.
Relational
Network
Hierarchical
The operation that is used to extract specific attributes from all the tuples of a relation
SELECT
PROJECT
UNION
INTERSECTION
The operation that is used to extract specific tuples from a given relation that satisfy a given condition for a relation
In relational data model , collection of logically records are known as
Relation
Table
Both (1) & (2)
The set of permissible values of the same type for a column is known as
tuples
attributes
domain
A candidate key that is not the primary key is called
The advantages of DBMS are
Data redundancy
Data Security
Data integrity
All of the above
The _____ data model was developed by E F Codd of IBM in 1970.
The number of tuples in a relation is called the _____ of a relation.
Degree
Cardinality
