In the database, what is the difference between attributes and entity. This can be clarified by a form in which everything is shown. For example, this is an arrow to what it refers to, and this is a circle to what it indicates. Thank you

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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In the database, what is the difference between attributes and entity. This can be clarified by a form in which everything is shown. For example, this is an arrow to what it refers to, and this is a circle to what it indicates.

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Step 1: Explanation

The two most frequently used terms in DBMSs are entity and attribute. An entity is an object that exists in the real world and can be clearly identified from all other real-world objects, whereas an attribute defines the characteristics or properties of an entity on the basis of which it is easily distinct from other entities of the real-world.

We gather the data in the relational database in the form of tables. Therefore, the columns of a table are thought of as attributes of the entities included in that table, and the rows of a table represent the entities of the same type.

An entity is a distinct, real "object" that actually exists. As soon as a thing can be easily distinguished from all other objects in the real world, it should be regarded as a "entity." Only that "thing" or "object" is thought of as an entity in a database for which data can be stored or retrieved. There is no use in creating that entity in a database if you are unable to save data about that object or if you are not going to retrieve that data.

The characteristics or properties of an entity in a database table are described by its attributes. The "fixed" collection of attributes defines an object in a database table. For instance, if we need to construct a student object, we can do so by giving it a set of attributes like their roll number, name, and course. Each student entity's attribute values will determine its characteristics in the table.

 

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