db_schema.xml

<?xml version="1.0"?>
<!--
/**
 * @category BDCrops
 * @package BDC_SimpleNews
 * @author Abdul Matin <matinict@gmail.com / info@bdcrops.com >
 * @copyright Copyright (c) 2018 BDCrops, Ltd (http://www.bdcrops.com)
 * @license http://opensource.org/licenses/afl-3.0.php Academic Free License (AFL 3.0)
 */
-->
<schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Setup/Declaration/Schema/etc/schema.xsd">

  <table name="bdc_simplenews" resource="default" engine="innodb" comment="SimpleNews Table">
        <column xsi:type="smallint" name="id" padding="6" unsigned="false" nullable="false" identity="true" comment="ID"/>
        <column xsi:type="varchar" name="title" nullable="false" length="255" comment="Title"/>
        <column xsi:type="varchar" name="summary" nullable="false" length="255" comment="Summary"/>
        <column xsi:type="text" name="description" nullable="false" comment="Descrition"/>
        <column xsi:type="timestamp" name="created_at" nullable="false" default="CURRENT_TIMESTAMP" on_update="false" comment="Created Datetime"/>
        <column xsi:type="timestamp" name="updated_at" nullable="false" default="CURRENT_TIMESTAMP" on_update="true" comment="Updated Datetime"/>
        <column xsi:type="smallint" name="status"  padding="2" unsigned="true" nullable="false"  default="0" comment="Status"/>
        <constraint xsi:type="primary" referenceId="PRIMARY">   <column name="id"/> </constraint>
    </table>
 </schema>