Add a column after another one in Magento 2

add_column_after.php

<?php
namespace My\Module\Setup;

use Magento\Framework\Setup\ModuleContextInterface;
use Magento\Framework\Setup\SchemaSetupInterface;
use Magento\Framework\Setup\UpgradeSchemaInterface;

/**
 * @codeCoverageIgnore
 */
class UpgradeSchema implements UpgradeSchemaInterface
{
    /**
     * {@inheritdoc}
     */
    public function upgrade(SchemaSetupInterface $setup, ModuleContextInterface $context)
    {
        $setup->startSetup();

        if (version_compare($context->getVersion(), '[SOME_VERSION]', '<')) {
            $setup->getConnection()->addColumn(
                $setup->getTable('my_module_table'),
                'my_column_name',
                [
                    'type' => \Magento\Framework\DB\Ddl\Table::TYPE_TEXT, // Or any other type
                    'nullable' => true, // Or false
                    'comment' => 'Some comment',
                    'after' => 'some_column_to_place_the_new_one_after'
                ]
            );
        }

        $setup->endSetup();
    }
}