Which of the following is not a suggestion by Salin regarding developing data names? Show
Prepare a definition of the data. Keep insignificant or illegal words. Arrange the words in a meaningful, repeatable way. Assign a standard abbreviation for each word. An attribute that uniquely identifies an entity and consists of a composite attribute is called a(n): An entity that associates the instances of one or more entity types and contains attributes specific to the relationships is called a(n): The number of entity types that participate in a relationship is called the: A relationship between the instances of a single entity type is called a(n) ________ relationship. A student can attend five classes, each with a different professor. Each professor has 30 students. The relationship of students to professors is a ________ relationship. A ________ specifies the number of instances of one entity that can be associated with each instance of another entity. A simultaneous relationship among the instances of three entity types is called a(n) ________ relationship. A relationship where the minimum and maximum cardinality are both one is a(n) ________ relationship. A value that indicates the date or time of a data value is called a(n): A mutually exclusive relationship is one in which: an entity instance can participate in only one of several alternative relationships. When a single instance of an entity is associated with more than one instances?M : M relationship is one which many instances of one entity are associated with many instances of another entity. An enterprise data model typically identifies only the most fundamental of entities of the enterprise.
What is the number of entity types that participate in a relationship called?Cardinality: The number of times an entity of an entity set participates in a relationship set is known as cardinality.
What is the greatest number of instances of one entity that can relate to a single instance of another entity group of answer choices maximum minimum one many many?the maximum number of entities that can be involved in a relationship. Maximum cardinality is typically represented as being either 1:1 (one-to-one), 1:N (one-to-many), N:1 (many-to-one), or M:N (many-to-many). The minimum number of instances of one entity that may be associated with each instance of another entity.
Which one refers to the number of instances in a relation?Cardinality of Relationships
Refers to the number of instances of entity A that can be associated with each instance of entity B. One-to-one: Each entity in the relationship will have exactly one related entity.
|
Which of the following is specifies the number of instances of one entity that can or must be associated with each instance of another?
zusammenhängende Posts
Urheberrechte © © 2024 defrojeostern Inc.
