好吧,它是这样的.我运行这段代码

PHP artisan make:migration create_student_table --create=student

并在迁移文件夹中创建新文件,如2016_04_08_061507_create_student_table.PHP

然后在该文件中我运行此代码

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

    class CreateStudentTable extends Migration
    {
        /**
         * Run the migrations.
         *
         * @return void
         */
        public function up()
        {
            Schema::create('student',function (Blueprint $table) {
                $table->increments('id');
                $table->timestamps();
                $table->string('name',20); 
                $table->string('email',255);
            });
        }

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

然后在cmd我运行PHP artisan migrate但它没有创建学生表.相反,它显示此消息

[PDOException] sqlSTATE[42S01]: Base table or view already exists:
1050 Table ‘users’ already exists

几天前我使用类似的方法创建了用户表.但是没有创建新的学生表.我在这里遗漏了什么？
提前致谢.