CODE EXAMPLE FOR PHP

Add fields to a table with a migration - Laravel

php artisan make:migration add_company_id_to_users_table

//in up() method
Schema::table('users', function (Blueprint $table) {
  $table->unsignedBigInteger('company_id');
});

//in down() method
Schema::table('users', function (Blueprint $table) {
  $table->dropColumn('company_id');
});