Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 5: Problem 2

Why are tuples in a relation not ordered?

Short Answer

Expert verified
Tuples in a relation are not ordered to uphold the principles of set theory, upon which the concept of relations is based, which denotes that elements in a set have no sequence or an order, thereby maintaining data accuracy and consistency.

Step by step solution

01

Understanding tuple

A tuple is a single row of a table, which contains a single record for that relation. Tuples hold the data in a database.
02

Understanding Relation

A relation in a relational database is a pre-defined data type for storing both the data and the relation between that data. It's essentially a table which holds these tuples.
03

Unordered nature of tuples

The main reason why tuples are unordered in a relation is because of the Set theory in mathematics, upon which the concept of relations is based. According to the Set theory, elements in a set have no sequence or a predefined order.\nThis principle is used in relational databases for data integrity and accuracy purposes. A relational database should return correct results regardless of the order of the tuples. In other words, the information should be consistent, independent of the order in which the data is stored or retrieved.
04

Database Management Systems (DBMS) using this principle

Most modern Relational Database Management Systems (RDBMS) implement this principle. They use this non-ordering functionality to optimize data retrieval and storage methodologies. Thus, helping in maintaining performance and consistency of the data.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Discuss the entity integrity and referential integrity constraints. Why is each considered important?

, Univ Section«, InstructorName, Semester, BuildingCode, Roome, TimePeriod, Weekdays, CreditHours). This represents classes taught in … # Consider the relation CLASs(Course#, Univ Section«, InstructorName, Semester, BuildingCode, Roome, TimePeriod, Weekdays, CreditHours). This represents classes taught in a university, with unique Univ_Section#. Identify what you think should be various candidate keys, and write in your own words the constraints under which each candidate key would be valid.

. Consider the following relations for a database that keeps track of business trips of salespersons in a sales office: SALESPERSON(SSN, Name, Start Year, DepcNo) TRIP(SSN, From_City, To_City, Departure_Date, Return_Date, Trip ID) EXPENsE(Trip ID, Accountg, Amount) Specify the foreign keys for this schema, stating any assumptions you make.

Why do we designate one of the candidate keys of a relation to be the primary key?

Discuss the various reasons that lead to the occurrence of null values in relations.
See all solutions

Recommended explanations on Computer Science Textbooks

Databases

Read Explanation

Data Structures

Read Explanation

Big Data

Read Explanation

Algorithms in Computer Science

Read Explanation

Computer Systems

Read Explanation

Functional Programming

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free