An intersection entity is used in a database when there is a many-to-many relationship between two entities. It serves as a bridge table to resolve the many-to-many relationship by breaking it into two one-to-many relationships. Each record in the intersection entity represents a combination of records from the two related entities.
A record refers to a collection of related information about a specific entity in a database. Each record typically contains fields that represent different attributes or properties of the entity being stored.
Yes, data elements are the smallest units of data that describe an entity in a database. They represent specific attributes or properties of the entity and are used to store and manipulate information about that entity.
A data point in a database is referred to as a field. It represents a single piece of data about a specific entity or object within a database.
Specialization in database management refers to the process of creating subtypes from a supertype entity in an entity-relationship (ER) model. It allows for the customization and organization of data based on unique characteristics within a specific subset of the main entity. This helps in categorizing and structuring data more efficiently.
The "drop" command is typically used in programming or databases to remove a specific element or entity. For example, in SQL, you can use the "DROP TABLE" command to delete a table from a database. It is important to use this command carefully, as it permanently deletes the specified object.
why do we need weak entity in database when we can make it strong entity?
In a relational database, a weak entity is an entity that cannot be uniquely identified by its attributes alone; therefore, it must use a foreign key in conjunction with its attributes to create a primary key.Wikipedia
A database object is represented as one of the following: database, schema, table, column, primary key, and foreign key A database Entity is: An entity is a thing or object of importance about which data must be captured. All things aren't entities - only those about which information should be captured. Information about an entity is captured in the form of attributes and/or relationships. If something is a candidate for being an entity and it has no attributes or relationships, it isn't an entity. Database entities appear in a data model as a box with a title. The title is the name of the entity.
entity relation model for hospital database
entity-relationship diagram.
Record
Entity Attribution Relationship
Entity means a specific thing in both database work and data modeling. An entity is data that can be classified, and has a relationship with other classified data, as in entities.
In usual mathematical study, a ray is the most commonly used entity to intersect a triangle.Howver, any geometric object can intersect a triangle, therefore the nature will differ depending on what you use to perform the intersection.
Record
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.
A record refers to a collection of related information about a specific entity in a database. Each record typically contains fields that represent different attributes or properties of the entity being stored.