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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.
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..
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.
When is the concept of weak entity used in data modelling?
A weak entity can be identified uniquely only by considering the primary key of another (owner) entity.
Full form of eer model?
ENHANCED ENTITY RELATIONSHIP OR EXTENDED ENTITY RELATIONSHIP
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 cardinality ratio in ER diagram?
It specify the number of relationship instances that an entity can participate in.
1An attribute which can be used to uniquely identify the individual instances of the entity is?
Primery Key.
What does the cardinality ratio specify?
The cardinality ratio specifies the number of relationship instances that an entity can participate in.
What is the name of a common database?
it describes the instance of one entity is associated with each instances of an entity depending upon the range of cardinality constraints are two types they are minimum cardinality maximum cardinality
What is total participation in database management?
Participation (or optionality) concerns the involvement of entities i a relationship. Participation is about exceptions to the rule. An entity's participation is optional if there is a least one instance of an entity which does not participate in the relationship. An entity participation is mandatory if all instances of an entity must participate in the relationship.
What are the purpose of business organization?
The purposes of business organizations extend to the establishment of procedure and structure to entities and individuals involved in commercial pursuits. Commercial entities and the individuals that operate them are subject to specific law, by application of a particular commercial entity structure to a commercial entity. The specific type of commercial entity organization also serves in some instances to facilitate the simplification of the application of tax law to the commercial entity.
What is an entity?
In VHDL, entity is the keyword for defining a new object. In SGML and its derived markup languages HTML and XML, an entity is a named body of data associated with a document. Once defined, an entity can be referenced any number of times within the document, via entity references. An entity typically consists of a sequence of one or more characters, either encapsulated within a declaration of the entity's existence, or encoded and stored externally in a text file. Such entities and their references are comparable to macros and include files in programming languages. However, entities don't necessarily have to contain parseable text; they may also be binary files that are included in a document only by reference, with the entity name as the value of an ENTITY-type attribute.Answer:An entity is something that has a distinct, separate existence, though it need not be a material existence. In particular, abstractions and legal fictions are usually regarded as entities. In general, there is also no presumption that an entity is animate. Entities are used in system developmental models that display communications and internal processing of, say, documents compared to order processing.An entity could be viewed as a set containing subsets. In philosophy, such sets are said to be abstract objects.Sometimes, the word entity is used in a general sense of a being, whether or not the referent has material existence; e.g., is often referred to as an entity with no corporeal form, such as a language. It is also often used to refer to ghosts and other spirits. Taken further, entity sometimes refers to existence or being itself. For example, the former U.S. diplomat George F. Kennan once said that "the policy of the government of the United States is to seek . . . to preserve Chinese territorial and administrative entity.Answer:An entity is a legally recognized and formally structured grouping of people focused on some common cause or objective.ExamplesHere are some examples of entities:SILan SIL branchUNESCO
Is delivers plural or singular?
plural is delivers singular is deliver
What is entity classes?
same as entity class or entity type or entity set
What is the difference between a reporting entity and a taxable entity?
the difference between a reporting entity and a taxable entity is, a reporting entity is the company or organization and the taxable entity is the individual.
Difference between entity and entity set?
Entity - Table Entity Set - Rows in Table
