epidemic/database/migrations/2021_01_16_132153_create_areas_table.php

<?php

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

class CreateAreasTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('areas', function (Blueprint $table) {
            $table->id();

            $table->bigInteger('pid')->default(0)->comment('父id');
            $table->char('code', 10)->nullable()->comment('编码');
            $table->string('name')->nullable()->comment('名字');
            $table->tinyInteger('level')->nullable(0)->comment('级别');

            $table->timestamps();
        });
    }

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