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What is the meaning of entity set?

Anonymous

∙ 16y ago

Updated: 12/17/2022

entity set is term as a collection of logicaly related entities.

Wiki User

∙ 16y ago

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Related Questions

What is the meaning of the set?

entity set is term as a collection of logicaly related entities.

Difference between entity and entity set?

Entity - Table Entity Set - Rows in Table

Can weak entity be converted into strong entity in DBMS?

A weak entity set can always be make into strong entity set by adding to its attribute of its identifying entity set. For a weak entity set, we add columns to the table corresponding to the primary key of the strong entity set on which the weak set is dependent.

What is strong and weak entity set?

the enitity which is set primary key is said to be strong entity and the entity which does not set primary key is said to be weak entity.

Can weak entity be converted into strong entity?

The primary key of a weak entity set is formed by taking the primary key of the strong entity set on which its existence depends (see Mapping Constraints) plus its discriminator. A strong entity set has a primary key. All tuples in the set are distinguishable by that key. A weak entity set has no primary key unless attributes of the strong entity set on which it depends are included. Tuples (a particular row) in a weak entity set are partitioned according to their relationship with tuples in a strong entity set. Tuples within each partition are distinguishable by a discriminator, which is a set of attributes.

What is entity classes?

same as entity class or entity type or entity set

Explain the difference between a weak and a strong entity set?

An entity set that does not possess sufficient attributes to form a primary key is called a weak entity set. One that does have a primary key is called a strong entity set. The discriminator (or partial key) of a weak entity set is the set of attributes that distinguishes among all the entities of a weak entity set The existence of a weak entity set depends on the existence of a identifying entity set. It must relate to the identifying entity set via a total, one-to-many relationship set from the identifying to the weak entity set We depict a weak entity set by double rectangles in E-R diagram. We underline the discriminator of a weak entity set with a dashed line in E-R diagram.

What is an extension of an entity type?

its an set of entity

What is weak entity sets in dbms?

An entity set may not have sufficient attributes to form a primary key is called weak entity set. One with primary key is called strong entity set.

What is the meaning of natural entity?

Hi everybody. I would appreciate if somebody could explain to me the meaning of "natural entity"

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.

Example of weak entity set?

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.

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