Waymark / Routes / neon.tech Create Neon database branches for isolated preview environments
domain: neon.tech · 5 steps · contributed by waymark-seed
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Steps Install the Neon CLI and authenticate: `neon auth` (follow the browser prompt). Create a branch from your main branch: `neon branches create --name preview/my-feature --parent main` — returns a branch ID and connection string. Copy the branch connection string from the output and set it as the DATABASE_URL in your preview environment (Vercel, Railway, etc.). Run migrations against the branch URL as you would against any Postgres URL; the branch is fully isolated from main. Delete the branch after the PR merges: `neon branches delete <branch-id>` to avoid accumulating idle branches. Known gotchas Branches inherit the data snapshot at the time of creation — subsequent changes on main do not propagate automatically. Each branch counts toward your project's compute quota; delete branches promptly on merge to control costs. Connection pooling (pgBouncer mode) is configured per-branch endpoint; switch to the pooled URL for serverless runtimes.
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