php artisan make:migration alter_sources_description --table=life_car_sources
php artisan migrate
php artisan migrate:rollback --step=1 # 回滚变更

<?php

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

/**
 * php artisan make:migration alter_sources_description --table=要改的表名称
 * php artisan migrate
 * php artisan migrate:rollback --step=1 # 回滚变更
 */
class AlterSourcesDescription extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::table('要改的表名称', function (Blueprint $table) {
            DB::statement("ALTER TABLE 要改的表名称 MODIFY vehicle_description varchar(1000) default '' NOT NULL COMMENT '车辆描述';");
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::table('要改的表名称', function (Blueprint $table) {
            DB::statement("ALTER TABLE 要改的表名称 MODIFY vehicle_description varchar(255) default '' NOT NULL COMMENT '车辆描述';");
        });
    }
}

​​Database: Migrations​​

新增字段

php artisan make:migration add_字段名_to_表名 --table=表名 

<?php

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

class AddPayMethodToOrder extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::table('表名', function (Blueprint $table) {
            $table->tinyInteger("字段名")->default(2)->comment("1-xxx 2-yyyy")->after("前面一个字段名");
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::table('表名', function (Blueprint $table) {
            $table->removeColumn("字段名");
        });
    }
}