Below are steps I went though to create a new database table in Magento 2 / Adobe Commerce

Create a module

You can add to your existing module or follow this blog to create a module

Create a db schema

Refernce https://devdocs.magento.com/guides/v2.4/extension-dev-guide/declarative-schema/db-schema.html
Path will be similar path to this app\code\AzCodez\CustomerViewing\etc\db_schema.xml
Add this code to setup your table. Modify table names, columns, types to suit your own

<?xml version="1.0"?>
<!-- Database schema -->
<schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Setup/Declaration/Schema/etc/schema. xsd">
    <table name="az_codez_followers" resource="default" engine="innodb" comment="Azcodez followers">
        <column xsi:type="int" name="follower_id" padding="19" unsigned="true" nullable="false" identity="true" comment="Follower id"/>
        <column xsi:type="text" name="name" nullable="false" comment="Follower Name"/>
        <column xsi:type="text" name="email" nullable="false" comment="Follower Contact"/>
        <constraint xsi:type="primary" referenceId="PRIMARY">
            <column name="follower_id"/>
        </constraint>
    </table>
</schema>

Generate generate db_schema_whitelist.json

docker-compose run --rm deploy magento-command setup:db-declaration:generate-whitelist

Redeploy

Find your table and see if it worked eg.

Select * From az_codez_followers;

Shameless Plugs

Credits

Feel free to comment with questions or feedback✌️

Happy coding,

Az 👨🏾‍💻

Create a database table in Magento 2