Skip to content
  • YouTube
  • FaceBook
  • Twitter
  • Instagram

Data Analytics Ireland

Data Analytics and Video Tutorials

  • Home
  • Contact
  • About Us
    • Latest
    • Write for us
    • Learn more information about our website
  • Useful Links
  • Glossary
  • All Categories
  • Faq
  • Livestream
  • Toggle search form
  • TypeError: type object is not subscriptable strings
  • How to pass multiple lists to a function and compare Python Functions
  • What is the difference between DROP and TRUNCATE in SQL? SQL
  • How to Add Formulas to Excel using Python numpy
  • How To Validate Cell Values In Excel Python
  • YouTube channel lists – Python working with files Python working with files
  • Python Tutorial: How to sort lists Python Lists
  • R Tutorial: How to pass data between functions R Programming

What is a Clustered Index in SQL?

Posted on February 23, 2023March 12, 2023 By admin

Estimated reading time: 2 minutes

In SQL, a clustered index is a type of index that determines the physical order of the data in a table.

It organizes the table data based on the values in one or more columns, and stores the data in the table accordingly. When a clustered index is created on a table, the rows of the table are stored on disk in the same order as the index.

Why would you create a clustered index?

There are several reasons as follows:

  • They can improve the performance of queries performed on a table.
  • As a result, the Detection of the data you require is more efficient and quicker, as the data is grouped together in the clusters.

Here are some key features of a clustered index:

  • A clustered index can be created on only one table per database.
  • A clustered index determines the physical order of the table data, and thus it affects the performance of queries that access the table.
  • A clustered index is usually created on columns that are frequently used in queries as search criteria or that are frequently sorted or grouped.

It’s worth noting that creating a clustered index on a table can be a time-consuming operation, as it involves reordering the table data on a disk.

Finally, it’s important to carefully consider the columns to use for a clustered index, as the wrong choice can actually decrease query performance.

SQL, Working with databases Tags:index values, sql

Post navigation

Previous Post: What is a Unique key in SQL?
Next Post: What is Query Optimization in SQL?

Related Posts

  • What is the difference between SQL and MySQL? SQL
  • How to create a calculated field in Tableau data visualisation
  • How to data cleanse a database table Python Data Cleansing
  • Explain different types of data Normalization. SQL
  • What is the difference between DROP and TRUNCATE in SQL? SQL
  • select rows with a certain value using SQL SQL

Select your language!

  • हिंदी
  • Español
  • Português
  • Français
  • Italiano
  • Deutsch
  • IndexError: single positional indexer is out-of-bounds Index Error
  • How to Add Formulas to Excel using Python numpy
  • How to data cleanse a database table Python Data Cleansing
  • YouTube channel lists – Python Data Cleansing Python Data Cleansing
  • R tutorial – How to sort lists using rstudio R Programming
  • How To Join Tables In SQL SQL
  • how to select columns with SQL SQL
  • How to Pass Python Variables to Javascript Javascript

Copyright © 2023 Data Analytics Ireland.

Powered by PressBook Premium theme

This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Cookie settingsACCEPT
Privacy & Cookies Policy

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may have an effect on your browsing experience.
Necessary
Always Enabled
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Non-necessary
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.
SAVE & ACCEPT