In case of entity integrity, the primary key may be

Related MCQs

• An entity in A is associated with at most one entity in B, and an entity in B is associated with at most one entity in A.This is called as
• An entity in A is associated with at most one entity in B. An entity in B, however, can be associated with any number (zero or more) of entities in A.
• There are similarities between the instructor entity set and the secretary entity set in the sense that they have several attributes that are conceptually the same across the two entity sets: namely, the identifier, name, and salary attributes. This process is called
• If an entity set is a lower-level entity set in more than one ISA relationship, then the entity set has
• Consider the employee work-team example, and assume that certain employees participate in more than one work team. A given employee may therefore appear in more than one of the team entity sets that are lower level entity sets of employee. Thus, the generalization is                            
• 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
• State true or false i) A candidate key is a minimal super key. ii) A candidate key can also refer to as surrogate key.
• An entity set that does not have sufficient attributes to form a primary key is termed a