shipping-notifications/ShippingNotifications/etc/db_schema.xml

<?xml version="1.0"?>

<schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Setup/Declaration/Schema/etc/schema.xsd">
    <table name="cpcommerce_shipping_notification_categories" resource="default" engine="innodb" comment="CP-Commerce Shipping Notification Delayed Categories">
        <column xsi:type="int" name="ship_categ_id" nullable="false" identity="true"/>
        <column xsi:type="int" padding="10" name="option_id" nullabe="false" default="0" unsigned="true"/>
        <column xsi:type="boolean" name="is_delayed" nullable="false"/>
        <constraint xsi:type="foreign" referenceId="SHIP_NOTIF_CATEG_ATTRIB_OPTION_VALUE" table="cpcommerce_shipping_notification_categories" column="option_id" referenceTable="eav_attribute_option_value" referenceColumn="option_id" OnDelete="CASCADE" />
        <constraint xsi:type="primary" refrenceId="ship_categ_id">
            <column name="ship_categ_id"/>
        </constraint>
    </table>
</schema>