In Magento 2, Magento Version 2.3 and higher version contains the declarative schema approach for database tables history.
You can create db_schema_whitelist.json using the command line with a single command,
The generated file location is the <Vendorname>/<Modulename>/etc/db_schema_whitelist.json in your module. Continue reading “Create db_schema_whitelist.json file using CLI in Magento 2.”