Magento 2 Declarative Schema and Data Patches, Safely
Change the Magento 2 database without breaking production: db_schema.xml, the whitelist, data and schema patches, revertable patches and the dry-run mode.
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Articles about Database
3 articles
How to Remove a Magento 2 Module Safely
Remove a Magento 2 extension without breaking the store: find dependencies, clean EAV attributes and widgets, disable first, then drop code, tables and config.
Magento 2 URL Rewrites Cleanup: Shrink the url_rewrite Table
Why the Magento 2 url_rewrite table grows to millions of rows, which settings cause it, how to measure it with SQL and how to clean it up without losing SEO.