DBMS-Relational Algebra and Calculus
DBMS-Relational Algebra and Calculus
32. What are all candidate keys, other than the primary keys called?
- secondary keys
- alternate keys
- eligible keys
- none of these
33. What is the name of the attribute or attribute combination of one relation whose values are required to match those of the primary key of some other relation?
- candidate key
- primary key
- foreign key
- matching key
34. what is the name of the attribute or attribute combination of one relation whose values are required to match those of the primary key of some other relation?
- candidate key
- primary key
- foreign key
- matching key.
37. What is the RDBMS terminology for a set of legal values that an attribute can have
- tuple
- relation
- attribute
- domain
38. What is the RDBMS terminology for a set of legal values that an attribute can have ?
- degree
- relation
- attribute
- cardinality
40. What is the RDBMS terminology for the number of attributes in a relation?
- degree
- relation
- attribute
- cardinality