atcheck/database/migrations/2019_11_26_232906_create_subjects_table.php

<?php

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

class CreateSubjectsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('subjects', function (Blueprint $table) {
            $table->bigIncrements('id')->unique();
            $table->string('name');
//            $table->string('type')->nullable();
            $table->string('weekday')->nullable();
            $table->string('time')->nullable();
            $table->integer('room_id');
            $table->integer('user_id');
            $table->timestamps();
        });
    }

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