Entitie are the principal data object about which information is to be collected. Entities are usually reognizable concepts,either concrete or abstract, such as: person,university,employees etc.
why do we need weak entity in database when we can make it strong entity?
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.
Entity Attribution Relationship
Record
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.
Entity occurrence in a database refers to a specific instance or realization of an entity type within a database schema. For example, if "Customer" is an entity type, a particular customer, such as "John Doe," represents an entity occurrence. Each occurrence holds unique attributes that distinguish it from other occurrences of the same entity type, typically stored as a row in a table. This concept is essential for organizing and managing data in relational databases.
Record
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.
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.
entity is an object with physical existence(car, house, person) or with conceptual existence (company, university course)