Relational model:In the personal model, data are prearranged in tables, which contain of table.A data in a table is called fields.Fields in a db table are also referred as qualities of a db object.A group of related fields are called as a record, which I also called as db object or entity.A group of records are called a table.Keys in a relational db table refer to a key field.To identify each record in a table, there must be at least one data field that should be unique. That is, a corresponding data field of every record should be unique.Therefore, key field is used to identify the unique record from a collection of records.

Explanation of Solution Importance of relational model: Relational model is important, due to the…

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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

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Relational model:

In the personal model, data are prearranged in tables, which contain of table.
A data in a table is called fields.
Fields in a db table are also referred as qualities of a db object.
- A group of related fields are called as a record, which I also called as db object or entity.
- A group of records are called a table.
- Keys in a relational db table refer to a key field.
  - To identify each record in a table, there must be at least one data field that should be unique. That is, a corresponding data field of every record should be unique.
  - Therefore, key field is used to identify the unique record from a collection of records.

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