The refinement from an initial entity set into successive levels of entity subgroupings represents a                  design process in which distinctions are made explicit.

Related MCQs

• If an entity set is a lower-level entity set in more than one ISA relationship, then the entity set has
• 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
• 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
• Every weak entity set can be converted into a strong entity set by:
• The iterator maintains the                      of its execution in between calls so that successive next() requests receive successive result tuples.
• For a weak entity set to be meaningful, it must be associated with another entity set, called the
• For a weak entity set to be meaningful, it must be associated with another entity set, called the
• 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.
• Which type of entity represents a logical generalization whose actual occurrence is represented by a second, associated entity?
• A                            constraint requires that an entity belong to no more than one lower- level entity set.