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Hello,

In this particular instance, we will be discussing how to execute an SQL file using Laravel migration. This post is intended to provide a straightforward example of running an SQL file through Laravel migration. We will delve into the topic of migrating an SQL file in Laravel. So, without further ado, let's explore the specifics.

If you want to run sql file in laravel migration then we need to use DB::statement(). DB::statement will allow to execute sql file from storage folder in laravel migration.

In this example, i will change viewer column datatype integer to varchar(255). we will create alter.txt file in storage folder to run it.

So, let's see the simple example of laravel migration change integer to string using DB::statement.

Default Created Table

Here, you will see the default created table screenshot.

Defile SQL File

Here, we will create alter.txt file with sql query. so, let's create it.

storage/app/db/alter.txt

ALTER TABLE `posts` CHANGE `viewer` `viewer` VARCHAR(255) NULL DEFAULT NULL;

Create Migration

Create new migration using following command:

php artisan make:migration change_datatype_column

Now, You can update it as like the bellow:

database/migrations/migration_name.php

<?php
   
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
use Illuminate\Support\Facades\Storage;
    
return new class extends Migration
{
    /**
     * Run the migrations.
     */
    public function up(): void
    {
        \DB::statement(Storage::get('db/alter.txt'));
    }
  
    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::table('posts', function (Blueprint $table) {
              
        });
    }
};

Now, you are ready to run migration command:

php artisan migrate

You will see the layout as like the below:

I hope it can help you...