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Which entity type depends is called identifying owner?
weak entity
When the PK of one entity does not contain the PK of a related entity the relationship is?
When the primary key (PK) of one entity does not contain the primary key of a related entity, the relationship is typically a "one-to-many" or "many-to-many" relationship. In this scenario, the primary key of the first entity can exist independently of the second entity, indicating that multiple instances of the related entity can correspond to a single instance of the first entity. This structure allows for more flexible data modeling where entities can be associated without strict dependency on each other's primary keys.
What occurs when a weak entity does not have a candidate key and its instances are indistinguishable without a relationship with another entity?
When a weak entity lacks a candidate key and its instances cannot be uniquely identified without a relationship to another entity, it relies on that relationship to establish its identity. This typically occurs in a one-to-many relationship where the weak entity’s existence is dependent on the strong entity, which provides the necessary identifying attributes. As a result, the weak entity will often include a foreign key from the related strong entity as part of its primary key. Without this relationship, instances of the weak entity would be indistinguishable and cannot be adequately represented in the database.
Examples of weak entity?
an entity set may not have sufficient attribute 2 form a primary key is called weak entity set.ex entity set payment has 3 attribute pay-no,pay-date, pay-amount.pay-no is a sequential no generated 4 each loan.each payment entity is distinct,payments 4 different loans may share the same payment no.thus entity set doent have a primary key,so it is a weak entity set. Placid04 bakhra,muzaffarpur,bihar.
What is equity instrument of another entity?
bonds
What kinds of data would you store in an entity subtype?
# What kinds of data would you store in an entity subtype?# What is a subtype discriminator? Given an example of its use.# What is an overlapping subtype? Give an example.# What is the difference between partial completeness and total completeness?# What kinds of data would you store in an entity subtype?# What is a subtype discriminator? Given an example of its use.# What is an overlapping subtype? Give an example.# What is the difference between partial completeness and total completeness?
What is the prupose of the subtype discriminator?
it just separates the sub type and supertype entity
What is subtype and super type in database?
In database design, a subtype is a specialized entity that inherits attributes and relationships from a higher-level entity called a supertype. Subtypes represent specific categories or types within a broader classification. The attributes and relationships unique to each subtype are represented in addition to those inherited from the supertype.
What is rosaceas scientific name?
There are four subtypes of rosacea.Here are the scientific names for each:Rosacea subtype 1 - Erythematotelangiectatic rosaceaRosacea subtype 2 - Papulopustular rosaceaRosacea subtype 3 - Phymatous rosaceaRosacea subtype 4 - Ocular rosacea
Exclusive subtype in a database?
An exclusive subtype in a database refers to a specific type of entity that can only belong to one of several possible subcategories within a parent category. This is typically used in entity-relationship modeling to represent situations where an instance of a superclass can be categorized into one and only one subclass. For example, in a database of vehicles, the "Car" superclass could have exclusive subtypes like "Sedan," "SUV," and "Truck," where a specific vehicle can only be classified as one of these types. This design helps maintain data integrity and ensures that each record is accurately represented.
What is inclusive and exclusive subtype entities?
Inclusive subtype entities are those that allow for instances of the subtype to also be considered instances of the supertype, meaning they can share attributes and behaviors of both. In contrast, exclusive subtype entities are those where instances of the subtype are distinctly separate from the supertype, meaning they cannot be classified as instances of the supertype at the same time. This distinction is crucial in data modeling and object-oriented design, where it affects how data is represented and interacted with.
What disease does the Campylobacter bacteria subtype known as C. jeuni cause?
C. jeuni is the subtype that most often causes gastrointestinal disease.
Subtype of schizophrenia in which there is immobility?
Catatonic schizophrenia.
What are sedmentary rocks subtype?
metaphorfic subgroup
What is the subtype for talc?
Talc is a subtype of the mineral group known as silicates. Specifically, talc is a phyllosilicate mineral, characterized by its sheet-like structure and softness.
A cricothyroidotomy is a subtype of what procedure?
Cricothyroidotomy is a subtype of surgical procedure known as a tracheotomy ; in some situations, it is considered an elective alternative to other types of tracheotomy
What is the subtype of the black eye galaxy?
Seyfert Galaxy
