SQL Server tutorial part 4 - Index

-

Indexes are used in SQL server to quickly retrieve the information

Type of Indexes

In SQL Server indexes are one of the following two types:
  1. Clustered Index 
  2. Non-Clustered Index. 

  • Clustered Index

A clustered index is the index that will arrange the rows physically in the memory in sorted order. An advantage of a clustered index is that searching for a range of values will be fast.

  • Non-clustered Index 

A non-clustered index is an index that will not arrange the rows physically in the memory in sorted order.  An advantage of a non-clustered index is searching for the values that are in a range will be fast. You can create a maximum of 999 non-clustered indexes on a table

Sample Table


Create index

Drop index


Please donate and support at https://www.paypal.me/Rajcoomar



Comments

Post a Comment

Popular posts from this blog

Car Wash System vb.net

-
Image
This software consists of a database that save the registration number of every vehicle being wash along side with the date, type of wash made and price Screen Shot Source Code To view records in the database: Dim conn As OleDbConnection = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|\washRcd.accdb;Persist Security Info=False") Dim sql As String sql = " SELECT * FROM tblwash" conn.Open() Dim dt As New DataTable Dim cmd2 As New OleDb.OleDbDataAdapter(sql, conn) cmd2.Fill(dt) DataGridView1.DataSource = dt DataGridView1.Refresh() conn.Close() To insert new record in the database: Private Sub insert() Dim conn As OleDbConnection = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|\washRcd.accdb;Persist Security Info=False") Dim updateSql As String = String.Format(...
Read more

Student Information System - AngularJS , ASP.NET API, C#

-
Image
Web based application the student information system is a small application that allows user to register and login to view information about a particular student and can perform several actions like Login and register to the application View students  Add new student Delete a particular student Update user information Screen Shot Project architecture routing.js, config.js and app.js allow the application to route from one partial view to another and config.js is used to save all the endpoint needed to access the API.   For separation of concerns, in the solution panel separate partial views, controller and services in different directories and reference it in index.html to enable angular to load all the files required Login process login.html LoginController.js Using $resource from AngularJS to make an API call and response  with a user details model UserViewModel and UserDetailsViewModel Using Unity fo...
Read more

Fake Call Android Application

-
Image
Fake Call android apps enable the user to simulate a call from their smartphone by entering a number were the apps will detect the network carrier and display it on screen. Technologies used are: Java, Xml. Developed using android studio and tested using android API 25 (Android 7.1.1 - Nougat) Screen Shot Select Fake Call from the home screen  Select Fake Call and enter the a phone number. You can also select to  call after a time interval as well  Click call to simulate a fake call with the network carrier, phone number as information Download Click here to download the game or source code Please donate and support at https://www.paypal.me/Rajcoomar
Read more