laracom/database/migrations/2018_07_03_023925_create_states_table.php

<?php

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

class CreateStatesTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('states', function (Blueprint $table) {
            $table->string('state');
            $table->string('state_code');
            $table->unsignedInteger('country_id');
            $table->foreign('country_id')->references('id')->on('countries');
        });
    }

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