# Database branching

**Source:** https://promtable.com/glossary/database-branching

> Database branching is the developer workflow where every PR / feature branch gets its own isolated database (copy-on-write of prod schema + sample data) — Neon, PlanetScale, Supabase, Turso ship branching as a flagship feature in 2026.

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Database branching is the developer workflow where every PR / feature branch gets its own isolated database (copy-on-write of prod schema + sample data) — Neon, PlanetScale, Supabase, Turso ship branching as a flagship feature in 2026.

Pre-branching, dev databases were either shared (concurrent dev work clobbers data) or per-dev seed scripts (drift from prod schema). Branching solves it: each PR opens a database branch (copy-on-write snapshot of prod schema, sometimes anonymized data sample), runs migrations + tests + manual QA against it, and discards on merge. Implementations: Neon (storage-level branching, sub-second branch creation), PlanetScale (keyspace branching + deploy requests), Supabase (preview branches), Turso (libSQL branches). Production patterns: PR opens → branch created → preview app deploys against it → reviewer hits live URL → merge closes branch. The unlock: catching migration footguns + dev environment fidelity without paying for N prod-sized DBs.

## When to use

- PR-based development workflows.
- Migration-heavy projects.

## Common mistakes

- Branching with non-anonymized prod data — PII exposure on dev instances.
- Not deleting branches — branches accumulate storage costs.

## Related terms

- [serverless-database](https://promtable.com/glossary/serverless-database)
- [shadow-deployment](https://promtable.com/glossary/shadow-deployment)

*Last updated: 2026-06-01*
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Original page: https://promtable.com/glossary/database-branching
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