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Difference between entity type and entity set?
lets understand them all: 1.An Entity is a real world "thing" which have independent existence. 2.Entity type is a category. 3.entity type is strictly calling, "an instance of entity type". 4.An entity type defines a collection of entities that have the same attributes. 5.Entity set : the collection of all entities of a particular entity type in the database at any point of time is called Entity set.
What is entity classes?
same as entity class or entity type or entity set
What is Entity instances?
Entity instance is a single occurrence of an entity type. Also known as an instance. Unlike entity type, many instances of entity type may be represented by data stored in the database.
Entity type vs entity instance?
Entity Type : A collection of entities that share common properties or characteristics. for example student is an entity type with common attributes such as student_ID , Name, Class etc. These characteristics are common to all students. Entity Instance: A single occurrence of a particular entity type is called entity instance..
A relationship between the instances of a single entity type is called a ........................?
A relationship between instances of a single entity type is called a self-relationship or recursive relationship. This type of relationship occurs when an entity is related to other instances of the same entity type within the same entity set.
What is the difference between the class and the entity?
A class is a type. An entity is a object created from this type. A class is like a definition and the entity behaves as per this definition.
Which entity type depends is called identifying owner?
weak entity
What is a virtual entity type used to represent multiple entities and relationships in an ERD?
entity cluster
What is entity occurrence in database?
Entity occurrence in a database refers to a specific instance or realization of an entity type within a database schema. For example, if "Customer" is an entity type, a particular customer, such as "John Doe," represents an entity occurrence. Each occurrence holds unique attributes that distinguish it from other occurrences of the same entity type, typically stored as a row in a table. This concept is essential for organizing and managing data in relational databases.
What type of domain extension does NASA have?
.gov
What type of rotation occurs when you perform knee extension?
Knee extension is primarily a sagittal plane movement that involves extension of the knee joint, resulting in straightening of the leg. It does not involve any specific type of rotation.
What is The joint that permits only flexion and extension?
Which type of diathrotic joint permits flexion and extension only?
