Working with MySQL Right Join in Laravel 8

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When we work with MySQL Queries, then definitely for some relational data we need to work with Joins. Inside this article we will see the concept of Right Join in Laravel 8.

Joins in Laravel 8 is the connection between one and more tables to get data. In MySQL we have Inner join, Left join, Right join etc.

We will see the concept of Right Join in this Laravel 8 article.

Learn Laravel 8 relationships –

This article will give you the detailed concept of about implementation of Right Join in laravel 8.

For this tutorial we will consider a employees table and a projects table.

Let’s get started.


Types of Joins available in Laravel 8

In Laravel 8 application, as per the documentation we have following types of joins available –

What is Right Join?

Right JoinThis also works same the matched condition between two or more than two tables. But in this case we also get the rows of right table which doesn’t match with the condition with the left hand sided table. Means we get all rows of right table including values of matched with left table.

How can we use inside an application and get relational data we will see by making an application. Let’s create an application in which we use Right Join.


Installation of Laravel Application

Laravel Installation can be done in two ways.

  • Laravel Installer
  • By using composer

Laravel Installer

To install Laravel via Laravel installer, we need to install it’s installer first. We need to make use of composer for that.

$ composer global require laravel/installer

This command will install laravel installer at system. This installation is at global scope, so you type command from any directory at terminal. To verify type the given command –

$ laravel

This command will open a command palette of Laravel Installer.

To create ad install laravel project in system,

$ laravel new blog

With the name of blog a laravel project will be created at your specified path.

By using composer

Alternatively, we can also install Laravel by Composer command create-project.

If your system doesn’t has composer Installed, Learn Composer Installation Steps.

Here is the complete command to create a laravel project-

$ composer create-project --prefer-dist laravel/laravel blog

After following these steps we can install a Laravel application into system.

To start the development server of Laravel –

$ php artisan serve

This command outputs –

Starting Laravel development server: http://127.0.0.1:8000

Assuming laravel already installed at system.


Create Database & Connect

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

CREATE DATABASE laravel_app;

To connect database with application, Open .env file from application root. Search for DB_ and update your details.

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=laravel_app
DB_USERNAME=root
DB_PASSWORD=root

Create Migrations & Model

Open project into terminal and run this artisan command.

$ php artisan make:model Employee -m

It will create two files –

  • Model file Employee.php at /app/Models folder.
  • Migration file 2021_06_15_062204_create_employees_table.php at /database/migrations folder.
$ php artisan make:migration create_projects_table

It will create a migration file 2021_06_15_062234_create_projects_table.php at /database/migrations folder.

Open 2021_06_15_062204_create_employees_table.php and write this following code into it.

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreateEmployeesTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('employees', function (Blueprint $table) {
            $table->increments("id");
            $table->string("name", 50);
            $table->string("email", 50);
            $table->string("phone_no", 20);
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('employees');
    }
}

Open 2021_06_15_062234_create_projects_table.php and write this following code into it.

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreateProjectsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('projects', function (Blueprint $table) {
            $table->id();
            $table->integer('employee_id')->unsigned();
            $table->string("project_name", 100);
            $table->foreign('employee_id')
                ->references('id')->on('employees')
                ->onDelete('cascade');
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('projects');
    }
}

Migrate Migrations

Back to terminal and run this command to migrate all migrations.

$ php artisan migrate

This command will migrate all.


Insert Test Data For Tables

Here, we have some mysql queries which will insert test data to employees and projects table.

Copy command and run into SQL tab of mysql database.

--
-- Dumping data for table `employees`
--

INSERT INTO `employees` (`id`, `name`, `email`, `phone_no`) VALUES
(1, 'Sanjay Kumar', 'sanjay@gmail.com', '8527419630'),
(2, 'Vijay Kumar', 'vijay@gmail.com', '9632587410'),
(3, 'Ashish Kumar', 'ashish@gmail.com', '7896541356'),
(4, 'Dhananjay Kumar', 'dhananjay@gmail.com', '7896585296'),
(5, 'Pradeep Kumar', 'pradeep@gmail.com', '7896556565');
--
-- Dumping data for table `projects`
--

INSERT INTO `projects` (`id`, `employee_id`, `project_name`) VALUES
(1, 1, 'Project 4'),
(2, 105, 'Project 7'),
(3, 300, 'Project 50');

Create Controller

Open project into terminal and run this command.

$ php artisan make:controller SiteController

It will create SiteController.php file at /app/Http/Controllers folder.

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\Employee;

class SiteController extends Controller
{
    public function getData()
    {
        $data = Employee::rightJoin("projects", function ($join) {
            $join->on("projects.employee_id", "=", "employees.id");
        })->get();

        //$data = Employee::rightJoin("projects", "projects.employee_id", "=", "employees.id")->get();

        /* Get Last Executed Query */
        // $query = Employee::rightJoin("projects", function ($join) {
        //     $join->on("projects.employee_id", "=", "employees.id");
        // })->toSql();

        // echo $query;

        echo "<pre>";
        print_r($data);
    }
}

Right Join Logic

$data = Employee::rightJoin("projects", function ($join) {
             $join->on("projects.employee_id", "=", "employees.id");
})->get();

OR

$data = Employee::rightJoin("projects", "projects.employee_id", "=", "employees.id")->get();

Generated Query

select * from `employees` right join `projects` on `projects`.`employee_id` = `employees`.`id`

Add Route

Open web.php file from /routes folder.

//...

use App\Http\Controllers\SiteController;

Route::get("right-join", [SiteController::class, "getData"]);

//...

Application Testing

Open project to terminal and type the command to start development server

$ php artisan serve

URL – http://127.0.0.1:8000/right-join

You will get your data set at output screen.

Complete Data of Right table + Matched data with Left Table


Advanced Cases in Right Join

Assuming these cases, you can take a hint from these.

Example 1: Laravel Eloquent rightJoin() with 2 Tables

$users = User::rightJoin('posts', 'users.id', '=', 'posts.user_id')                ->get(['users.*', 'posts.descrption']);

Generated Query

select `users`.*, `posts`.`descrption` from `users`  right join `posts` on `users`.`id` = `posts`.`user_id`

Example 2: Laravel Eloquent rightJoin() with 3 Tables

$users = User::rightJoin('posts', 'posts.user_id', '=', 'users.id')               ->rightJoin('comments', 'comments.post_id', '=', 'posts.id')               ->get(['users.*', 'posts.descrption']);

Generated Query

select `users`.*, `posts`.`descrption` from `users`  right join `posts` on `posts`.`user_id` = `users`.`id`  right join `comments` on `comments`.`post_id` = `posts`.`id`

Example 3: Laravel Eloquent rightJoin() with Multiple Conditions

$users = User::rightJoin('posts', 'posts.user_id', '=', 'users.id')             ->where('users.status', 'active')
->where('posts.status','active')
->get(['users.*', 'posts.descrption']);

Generated Query

select `users`.*, `posts`.`descrption` from `users`  right join `posts` on `posts`.`user_id` = `users`.`id`  where `users`.`status` = active and `posts`.`status` = active

We hope this article helped you to learn about MySQL Right Join in Laravel 8 Tutorial in a very detailed way.

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