mint/database/migrations/2021_12_29_050502_create_progress_table.php

<?php

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

class CreateProgressTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('progress', function (Blueprint $table) {
            $table->id();
            $table->integer('book');
            $table->integer('para');
            $table->string('lang',16);
            $table->integer('all_strlen');
            $table->integer('public_strlen');
			$table->timestamp('created_at')->useCurrent();
			$table->index(['book','para']);
			$table->index(['book','para','lang']);
        });
    }

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