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Install Schema/Upgrade Schema: https://vi-magentowww.cloudways.com/blog/taosetup-bangscripts-trongin-magento-voi-setup-script2/
It is old and already deprecated in lastest Magento. Now, you should use Declarative Schema to add/modify the table in database for your module
Declarative Schema:
https://devdocsdeveloper.magentoadobe.com/guides/v2.4/extension-dev-guidecommerce/php/development/components/declarative-schema/https://vi-magento.com/db_schema-xml-trong-magento-2/
Exercise:
Create new module, use Declarative Schema to create table with the following schema:
https://developer.adobe.com/commerce/php/development/components/declarative-schema/configuration/
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Use Schema Patch to add column: Age, Country to the actor https://developer.adobe.com/commerce/php/development/components/declarative-schema/patches/