# How to Deploy Schema Changes to a Million Databases

DevFeed: [How to Deploy Schema Changes to a Million Databases](<https://devfeed.tech/articles/how-to-deploy-schema-changes-to-a-million-databases-5966.md>)

Original publisher: [Read original article](<https://turso.tech/blog/how-to-deploy-schema-changes-to-a-million-databases>)

Author: Jamie Barton

Published: 2025-06-02T00:00:00Z

Content type: tutorial

Language: en

Sources: [Turso Blog](<https://devfeed.tech/sources/turso-blog.md>)

Topics: [migration](<https://devfeed.tech/topics/migration.md>), [SQLite](<https://devfeed.tech/topics/sqlite.md>), [Databases](<https://devfeed.tech/topics/databases.md>), [Software as a service](<https://devfeed.tech/topics/saas.md>), [client](<https://devfeed.tech/topics/client.md>), [Orchestration](<https://devfeed.tech/topics/orchestration.md>)

Tags: [architecture](<https://devfeed.tech/tags/architecture.md>), [databases](<https://devfeed.tech/tags/databases.md>), [how-to](<https://devfeed.tech/tags/how-to.md>), [migration](<https://devfeed.tech/tags/migration.md>), [registry](<https://devfeed.tech/tags/registry.md>), [saas](<https://devfeed.tech/tags/saas.md>), [sql](<https://devfeed.tech/tags/sql.md>), [sqlite](<https://devfeed.tech/tags/sqlite.md>)

## AI overview

This tutorial explains how to deploy schema changes across millions of isolated SQLite databases in a SaaS application. It proposes a lightweight, versioned schema registry that lets client applications discover and apply required SQL migrations locally instead of having servers coordinate every tenant update.

## Source excerpt

How to roll out schema migrations across millions of SQLite databases by letting clients pull versioned scripts from a lightweight registry, not pushing.