MySQL Order By in CodeIgniter 4 Query Builder Tutorial

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CodeIgniter 4 provides the complete set of Query builder methods to use in querying database. Inside this article we will see the concept of MySQL Order By in codeigniter 4 Query builder.

In Query builder to use Order By we have a method available. Order by helps us to get data with a certain order like ascending or descending.

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Note*: For this article, CodeIgniter v4.1 setup has been installed. May be when you are seeing, version will be updated. CodeIgniter 4.x still is in development mode.

Let’s get started.


Create Database & Table in Application

To create a database, either we can create via Manual tool of PhpMyadmin or by means of a mysql command.

CREATE DATABASE codeigniter4_app;

Next, we need a table. That table will be responsible to store data. Let’s create a table with some columns.

CREATE TABLE `students` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `name` varchar(50) NOT NULL,
 `email` varchar(50) NOT NULL,
 `phone_no` varchar(15) NOT NULL,
 PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

Successfully, we have created a database and a table.


Dump Test Data To Table

Open MySQL database and run this command to insert test data into table.

--
-- Dumping data for table `students`
--

INSERT INTO `students` (`id`, `name`, `email`, `phone_no`) VALUES
(1, 'Sanjay Kumar', 'sanjay_kumar@gmail.com', '8527419630'),
(2, 'Sanjay Mishra', 'sanjaymishra1001@yahoo.com', '7456321089'),
(3, 'Rahul Khanna', 'rahulkhanna@yahoo.com', '9632145870'),
(4, 'Vijay Singh', 'vijay_singh@gmail.com', '7896541230'),
(5, 'Suraj Lal', 'suraj_lal@outlook.com', '7894563210'),
(6, 'Dhananjay Kumar', 'dhananjay_kumar@outlook.com', '8529633217');

Here, we have few rows taking to understand the concept of orderBy() method. You can consider many more rows.


CodeIgniter 4 Order By Method

In CodeIgniter 4, orderBy() named method available for order specific.

$builder->orderBy('column_name','ASC | DESC | RANDOM')

Example #1 (DESC)

Task

We want to list all students order by name in descending order.

MySQL Query

SELECT * FROM students order by name DESC

Writing in CodeIgniter 4

We will use Query builder –

<?php

namespace App\Controllers;

class Home extends BaseController
{
	public function __construct()
	{
		$this->db = db_connect();
	}

	public function index()
	{
		$builder = $this->db->table("students");

		$builder->select('*');
		$builder->orderBy('name', 'DESC');
		$query = $builder->get();

		echo "<pre>";
		print_r($query->getResult());
      
        // Get last executed query
        // $this->db->getLastQuery();
	}
    
    //...
}

Example #2 (ASC)

Task

We want to list all students order by name in ascending order.

MySQL Query

SELECT * FROM students order by name ASC

Writing in CodeIgniter 4

$builder = $this->db->table("students");

$builder->select('*');
$builder->orderBy('name');
$query = $builder->get();

As, you can see we have used $builder->orderBy(‘name’); Optionally if we want ASC into second value, it is also Ok.

$builder = $this->db->table("students");

$builder->select('*');
$builder->orderBy('name', 'ASC');
$query = $builder->get();

Example #2 (RANDOM)

Task

We want to list all students order by name in random order. It will provide you the data in random order. It uses MySQL RAND() function.

MySQL Query

SELECT * FROM `students` ORDER BY RAND()

Writing in CodeIgniter 4

$builder = $this->db->table("students");

$builder->select('*');
$builder->orderBy('name', 'random');
$query = $builder->get();

We hope this article helped you to learn MySQL Order By in CodeIgniter 4 Query Builder Tutorial in a very detailed way.

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