yii2 Database Migrations Drop / Rename / Alter Column
Example
public function up()
{
$this->dropColumn('post', 'position');
$this->renameColumn('post', 'owner_id', 'user_id');
$this->alterColumn('post', 'updated', $this->timestamp()->notNull()->defaultValue('0000-00-00 00:00:00'));
}
