A                on the attribute A of relation r consists of one bitmap for each value that A can take.

Related MCQs

• A                  on an attribute of a relation is a data structure that allows the database system to find those tuples in the relation that have a specified value for that attribute efficiently, without scanning through all the tuples of the relation.
• An attribute in a relation is a foreign key if the                key from one relation is used as an attribute in that relation.
• An attribute in a relation is a foreign key if the _______ key from one relation is used as an attribute in that relation.
• A attribute in a relation is a foreign key if the _______ key from one relation is used as an attribute in that relation .
• Given the relation Supplier(s_id, p_order, s_name, qty) Given that there is a unique s_name for each s_id and that s_id, p_order is a composite key, find the correct statement among the following: i. this relation is a BCNF ii. this is 3 NF relation iii. this is a 2 NF relation iv. this is a 1 NF relation
• The relation with the attribute which is the primary key is referenced in another relation. The relation which has the attribute as a primary key is called                              
• The relation with the attribute which is the primary key is referenced in another relation. The relation which has the attribute as a primary key is called ______________
• The relation with the attribute which is the primary key is referenced in another relation. The relation which has the attribute as primary key is called
• Every time attribute A appears, it is matched with the same value of attribute B, but not the same value of attribute C. Therefore, it is true that:
• For each attribute of a relation, there is a set of permitted values, called the                   of that attribute.