Souke/console/migrations/m161021_073634_table_etablissement.php

<?php

use yii\db\Migration;
use yii\db\Schema;

class m161021_073634_table_etablissement extends Migration
{
    public function up()
    {
        $this->createTable('etablissement', [
    		'id' => 'pk',
                'nom' => Schema::TYPE_STRING . ' NOT NULL',
                'siret' => Schema::TYPE_STRING . ' NOT NULL',
                'logo' => Schema::TYPE_STRING,
                'photo' => Schema::TYPE_STRING,
                'description' => Schema::TYPE_TEXT,
                'code_postal' => Schema::TYPE_STRING,
                'ville' => Schema::TYPE_STRING,
    	]);
    }

    public function down()
    {
       $this->dropTable('etablissement') ;
    }

    /*
    // Use safeUp/safeDown to run migration code within a transaction
    public function safeUp()
    {
    }

    public function safeDown()
    {
    }
    */
}