What are the differences between generalization and Specialization?
The fundamental difference between generalization and specialization is that Generalization is a bottom-up approach. However, specialization is a top-down approach. Generalization is always applied to the group of entities whereas, specialization is always applied on a single entity.
What is generalization in DBMS with example?
It is the reverse process of Specialization. For example, Whales, Sharks, and Dolphins can be generalized as Fish. Similarly, Bicycle, Bike, and Car can be generalized as Vehicles. Example: Suppose we have two entity types, Employee and Customer.
What is the difference between Specialization and generalization with respect to database?
The key difference between Generalization and Specialization in DBMS is that a Generalization is a Bottom-up approach. while Specialization is a Top-down approach. Generalization is a bottom-up design process that combines a number of entity sets that have the same features into a higher-level entity.
What is difference between generalization and specialization with example?
Generalization is normally applied to group of entities. We can apply Specialization to a single entity. In Generalization, the difference and similarities between lower entities are ignored to form a higher entity. In Specialization, a higher entity is split to form lower entities.
What do you mean by generalization and specialization explain with example?
Generalization is the process of extracting shared characteristics from two or more classes, and combining them into a generalized superclass. Consider whether some of the classes that you found could be generalized. In contrast to generalization, specialization means creating new subclasses from an existing class.
What is specialization in DBMS Mcq?
Explanation: The process of designating sub-groupings within the entity set is called as specialization. Specialization allows us to distinguish among entities. Explanation: We can apply specialization multiple times to refine a design.
What is generalization and specialization in DBMS in Hindi?
जाता हैं और उसे व्यक्त किया जाता है. Aggregation की यह प्रक्रिया तब तक चलती हैं जब तक दो entity के मध्य Relation को
What is the difference between specialization and generalization Why do we not display this difference in schema diagrams?
In generalization, a higher entity must have some lower entities whereas, in specialization, a higher entity may not have any lower entity present. Generalization helps in reducing the size of schema whereas, specialization is just opposite it increases the number of entities thereby increasing the size of a schema.
What is generalization and specialization?
Specialization and generalization are main principles of database modeling. Specialization is based on a refinement of types or classes to more specific ones. Generalization maps or groups types or classes to more abstract or combined ones.
What is specialization in DBMS?
Specialization is a top-down approach in which a higher-level entity is divided into multiple specialized lower-level entities. Specialization is usually used to find subsets of an entity that has a few different or additional attributes. …
What’s the difference between a specialization and a generalization?
Specialization is a process of taking a subset of a higher level entity set to form a lower-level entity set. Generalization process starts with the number of entity sets and it creates high-level entity with the help of some common features.
Which is an example of a DBMS specialization?
DBMS Generalization, Specialization, and Aggregation 1 Example. CAR is an abstraction of personal shipment and does not disclose information about the model, color, capacity, and so on. 2 Generalization. 3 Specialization. 4 Aggregation. 5 Example.
When does a generalization occur in a DBM?
Generalization occurs when we ignore the differences and acknowledge the similarities between lower entities or child classes or relations (tables in DBMS) to form a higher entity.
When to use generalization in a relational schema?
Generalization, this term is often used while designing any relational Schema. If designing proceeds in a bottom-up manner then it is featured as Generalization. If the entities, that are figured out to create a schema shares some similar features, then they are combined to form a higher-level entity.
