nexusphp/database/migrations/2021_06_08_113437_create_exams_table.php

<?php

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

class CreateExamsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        if (Schema::hasTable('exams')) {
            return;
        }
        Schema::create('exams', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->string('name');
            $table->text('description')->nullable();
            $table->dateTime('begin')->nullable();
            $table->dateTime('end')->nullable();
            $table->integer('duration')->default(0);
            $table->text('filters')->nullable();
            $table->text('indexes');
            $table->tinyInteger('status')->default(0);
            $table->tinyInteger('is_discovered')->default(0);
            $table->timestamps();
        });
    }

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