Netlify Database

Netlify Database

Zero-config managed Postgres. Install @netlify/database, write migrations under netlify/database/migrations/, deploy — Netlify provisions the DB and applies migrations automatically. Queryable from Functions, Edge Functions, Builds, and Agent Runners.

Modern client (reach for this)

import { getDatabase } from "@netlify/database";

const db = getDatabase();               // auto-selects connection for the runtime
const userId = 42;
const users = await db.sql`SELECT * FROM users WHERE id = ${userId}`;  // auto-parameterized

Own driver / ORM instead:

import { getConnectionString } from "@netlify/database";
const connectionString = getConnectionString();  // correct branch for this env

Legacy — do NOT use for new code: import { neon } from "@netlify/neon". Superseded by @netlify/database. Replace neon() calls with the Drizzle netlify-db adapter or a Postgres driver via getConnectionString(). The legacy env var NETLIFY_DATABASE_URL is replaced by NETLIFY_DB_URL.

Where things go

Querying

getDatabase(options?) returns a client with sql and pool. options.connectionString overrides the auto-provisioned one; options.debug enables logging.

const db = getDatabase();
const active = await db.sql`SELECT * FROM users WHERE active = ${true}`;
await db.sql`INSERT INTO users (name, email) VALUES (${"Ada"}, ${"ada@example.com"})`;
await db.sql`UPDATE users SET name = ${"Ada Lovelace"} WHERE id = ${1}`;
await db.sql`DELETE FROM users WHERE id = ${1}`;

// Type the rows
interface User { id: number; name: string; email: string; }
const typed = await db.sql<User>`SELECT * FROM users`;

// Stream
for await (const row of db.sql`SELECT * FROM users`.stream()) { /* ... */ }
for await (const chunk of db.sql`SELECT * FROM users`.chunked(100)) { /* ... */ }

SQLTemplate methods: execute() → Promise<T[]>, stream() → AsyncGenerator<T>, chunked(n) → AsyncGenerator<T[]>, toSQL() → raw SQL + params without executing.

sql helpers:

• sql.identifier(value) — safe table/column name. String, string[], or { schema, table, column, as }.
• sql.values(rows) — bulk-insert values list from a 2D array.
• sql.default — the SQL DEFAULT keyword.
• sql.raw(value) — injects unparameterized SQL; bypasses injection protection. Only for trusted constants (e.g. "DESC"), never user input.
• sql.unsafe(query, params?, { rowMode }) — raw query string with $1 params; rowMode is "array" or "object".

Transactions — use pool

db.pool is a pg.Pool. BEGIN/queries/COMMIT must run on the same connection:

const client = await db.pool.connect();
try {
  await client.query("BEGIN");
  await client.query("INSERT INTO users (name, email) VALUES ($1, $2)", ["Ada", "ada@example.com"]);
  await client.query("INSERT INTO posts (author_id, title) VALUES ($1, $2)", [1, "First post"]);
  await client.query("COMMIT");
} catch (e) {
  await client.query("ROLLBACK");
  throw e;
} finally {
  client.release();
}

Own drivers:

import { getConnectionString } from "@netlify/database";
import pg from "pg";
const pool = new pg.Pool({ connectionString: getConnectionString() });

// or the `postgres` driver via env var
import postgres from "postgres";
const sql = postgres(process.env.NETLIFY_DB_URL);

Drizzle ORM

Install both packages from @beta — required. latest lacks the drizzle-orm/netlify-db adapter and will fail.

npm install @netlify/database drizzle-orm@beta
npm install -D drizzle-kit@beta

drizzle.config.ts — you MUST set out to the Netlify migrations directory or Netlify won't apply generated migrations:

import { defineConfig } from "drizzle-kit";
export default defineConfig({
  dialect: "postgresql",
  schema: "./db/schema.ts",
  out: "netlify/database/migrations",   // NOT the default "drizzle"
});

import { pgTable, serial, text, timestamp } from "drizzle-orm/pg-core";
export const users = pgTable("users", {
  id: serial().primaryKey(),
  name: text().notNull(),
  email: text().notNull().unique(),
  createdAt: timestamp().defaultNow(),
});

import { drizzle } from "drizzle-orm/netlify-db";  // native adapter, auto-configured
import * as schema from "./schema";
export const db = drizzle({ schema });

import { desc } from "drizzle-orm";
import type { Config, Context } from "@netlify/functions";
import { db } from "../../db";
import { users } from "../../db/schema";

export default async (req: Request, context: Context) => {
  if (req.method === "GET") {
    const allUsers = await db.select().from(users).orderBy(desc(users.createdAt));
    return Response.json(allUsers);
  }
  if (req.method === "POST") {
    const { name, email } = await req.json();
    const [user] = await db.insert(users).values({ name, email }).returning();
    return Response.json(user, { status: 201 });
  }
  return new Response("Method not allowed", { status: 405 });
};

export const config: Config = { path: "/api/users" };

Generate migrations after editing the schema: npx drizzle-kit generate.

Never run drizzle-kit push against a Netlify-hosted database, and never run drizzle-kit migrate against NETLIFY_DB_URL. Schema reaches hosted DBs only as committed migration files applied by the deploy. generate writes files; the deploy applies them.

Migrations

Files live in netlify/database/migrations/. Two formats:

netlify/database/migrations/20260301143000_create_users.sql          # single SQL file
netlify/database/migrations/20260318091500_add_posts/migration.sql   # subdir form

Naming: <number>_<slug> — number is digits (timestamp or 0001…) defining order; slug is lowercase letters/numbers/hyphens/underscores. Sorted lexicographically, applied in order. Use timestamp prefixes (netlify database migrations new handles this) to avoid out-of-order rejection.

CREATE TABLE comments (
  id SERIAL PRIMARY KEY,
  post_id INTEGER NOT NULL REFERENCES posts(id),
  author_id INTEGER NOT NULL REFERENCES users(id),
  body TEXT NOT NULL,
  created_at TIMESTAMP DEFAULT NOW()
);

When applied:

• Production deploy: applied immediately before publish; a failure blocks publish. With auto-publish off, Netlify waits for manual publish before applying.
• Deploy preview: applied on every deploy before it goes live; a failure fails the deploy.
• Local: not automatic — run netlify database migrations apply yourself.

Migration footguns (all detected as drift / rejected):

• Never edit an applied migration — checksum drift: migration "<name>" has been modified after being applied. Write a new corrective migration.
• Never remove an applied migration — ... has been removed after being applied. Restore it.
• Out-of-order: a prefix ≤ the highest applied version is rejected. Timestamps avoid this.
• Prefer backwards-compatible migrations. Breaking changes (rename/drop column) → expand-and-contract across multiple deploys. New table / nullable column → single migration is fine.

Bring-your-own migration system: pick a directory other than netlify/database/migrations to avoid automatic detection, and you own applying to preview branches and production.

See references/migrations.md.

Local development

Local is one database that all code targets — branches are a deploy-time concept and don't exist locally. It's a real Postgres-compatible engine mirroring production, but single-process (not for load testing); auto-scale/sleep settings don't apply.

Start it — either path, state is interchangeable:

netlify dev                                    # CLI starts + tears down the local DB

Or the Vite plugin:

import { defineConfig } from "vite";
import netlify from "@netlify/vite-plugin";
export default defineConfig({ plugins: [netlify()] });

Common commands (while local DB is running):

netlify database migrations apply                        # apply pending locally
netlify database migrations new -d "add users table"     # scaffold new migration
netlify database migrations pull                          # overwrite local migrations from remote
netlify database status                                   # enabled? installed? applied/pending migrations
netlify database connect                                  # interactive SQL REPL
netlify database connect --query "SELECT * FROM users LIMIT 10"
netlify database reset                                    # drop all schemas/tables — LOCAL ONLY
netlify database migrations reset                         # delete unapplied local migration files

External tools (works while netlify dev runs):

psql "$(netlify database connect --json | jq -r .connection_string)"

See references/local-dev.md.

Setup

New project: describe your app to Agent Runners at https://app.netlify.com/start, or netlify create "<description>" locally.

Existing project:

netlify database init      # installs @netlify/database, picks Drizzle or raw SQL, scaffolds a migration
netlify database init --yes # non-interactive (CI / agents)
netlify dev

Manual: npm install @netlify/database, write a migration under netlify/database/migrations/, write a function, netlify dev, deploy.

If @netlify/database is NOT installed, Netlify will NOT auto-provision a database — you'd have to create one manually from the UI Database menu. Install the package.

CLI reference (netlify database)

Prereqs: Node ≥ 20.12.2, Netlify CLI ≥ 26.0.0 (npm install -g netlify-cli). All commands support --json.

See references/cli-commands.md.

REST API

Scoped to a site, rooted at https://api.netlify.com/api/v1, OAuth 2. Full reference: https://open-api.netlify.com.

Branch delete and snapshot restore are destructive and require explicit user confirmation first. Snapshot restore is not a routine production-rollback lever.

Testing

Bare Postgres for unit/integration tests (no functions):

import { NetlifyDB } from "@netlify/database-dev";  // npm i -D @netlify/database-dev
import { Client } from "pg";
import { afterAll, beforeAll, expect, test } from "vitest";

let db: NetlifyDB, connectionString: string;
beforeAll(async () => {
  db = new NetlifyDB();
  connectionString = await db.start();
  await db.applyMigrations("./netlify/database/migrations");
});
afterAll(async () => { await db.stop(); });

test("inserts and reads a user", async () => {
  const client = new Client({ connectionString });
  await client.connect();
  await client.query("INSERT INTO users (name) VALUES ($1)", ["Ada"]);
  const { rows } = await client.query("SELECT name FROM users");
  expect(rows).toEqual([{ name: "Ada" }]);
  await client.end();
});

NetlifyDB(options?): directory (persist to disk; omit = in-memory), port (default random), logger.

Full Netlify environment (functions/edge functions read NETLIFY_DB_URL as in production):

import { NetlifyDev } from "@netlify/dev";  // npm i -D @netlify/dev
const netlifyDev = new NetlifyDev({ projectRoot: "./fixtures/my-project" });
await netlifyDev.start();  // sets NETLIFY_DB_URL in the runtime
// ...tests...
await netlifyDev.stop();

Database branches (deploy-time)

Production deploys are the only deploys that touch the production database. Each deploy preview gets its own branch, seeded with a copy of production data at preview-creation time; schema/data changes there never affect production. Wired up automatically, no code changes.

Preview branches can contain production data, including PII — and preview deploy links are public. Warn the user before sharing a preview link.

Runtime gotchas

• Environment not configured (getDatabase() can't resolve a connection string): running outside Netlify, on Functions in Lambda compatibility mode, or an outdated CLI. Fix: pass connectionString explicitly.

  const db = getDatabase({ connectionString: "postgres://..." });
  

  Lambda compatibility mode is the one primitive where you must pass connectionString yourself.
• database feature not available for this account — requires a Credit-based plan.
• compute customization requires a Pro or higher plan — auto-scale / sleep settings need Pro+; Free/Personal use defaults.
• branch limit reached: maximum <N> branches... — each active deploy preview consumes a branch; delete unneeded branches or upgrade.
• database not found — no DB provisioned; run netlify database init.
• cannot reset the production branch — reset is non-production only.

Constraints

• Plan: Netlify Database is available on Credit-based plans only; active DBs consume credits for compute and bandwidth. Storage is free until July 1, 2026.
• Permissions: only a Team Owner can delete a database; only Team Owners and Developers can view connection strings (Access Denied = insufficient role).
• Secrets: connection strings contain username + password. Never commit them; store in a secret manager / env var provider.

Switch an existing Postgres project to Netlify Database

Three phases: provision (baseline schema on a branch), rehearse (swap code, copy data into a preview branch, validate), cut over (import data into production, merge). Works from any Postgres source (Neon, Supabase, RDS, self-managed, legacy @netlify/neon). Uses pg_dump/pg_restore (versions matching the source). There is a brief data-loss window — writes to the source between final export and production deploy don't cross over.

Phase 2/3 code swap (Drizzle):

import { drizzle } from "drizzle-orm/netlify-db";
import * as schema from "./schema";
export const db = drizzle({ schema });

Full step-by-step (dump flags, rollback, cleanup): references/migration-from-extension.md and references/legacy-extension.md.

Netlify house rules (database)

These are org conventions, not docs facts — merged into the rendered skill by ctx-gen and never generated. Owned by the skills maintainer.

1. Production data changes are expressed as DML migrations — agents never edit rows directly (UI row editing exists for humans; it is not an agent surface).
2. Preview branches can contain production data, including PII — and preview deploy links are public. Warn before sharing.
3. Use only documented surfaces: no raw psql against internal endpoints, no netlify api scraping, no reading tokens from local CLI config files.
4. Deep guides live in this skill: references/operational-footguns.md, references/migrations.md, references/local-dev.md, references/cli-commands.md, references/migration-from-extension.md, references/legacy-extension.md.
5. Schema changes reach hosted databases only as committed migration files applied by the deploy. Never run drizzle-kit push in any form against a Netlify-hosted database, never run drizzle-kit migrate against NETLIFY_DB_URL, and never apply DDL via netlify database connect or any direct connection.
6. When a netlify command or a deploy fails, surface the exact error, the deploy log URL, and the affected site/branch to the user and stop — do not invent recovery commands or escalate to lower-level tools.
7. First-deploy 401 Access Denied on createSiteDatabase: if it happened on a --prod-first deploy, retry preview-first (netlify deploy, no --prod); if a preview also fails, report and stop. Never curl api.netlify.com, run netlify api createSiteDatabase, or pull tokens from local CLI config to work around it.
8. A request to change existing data is ambiguous between production and the preview branch — if the prompt didn't say, ask. When acting on someone's behalf, default to not touching production.
9. Destructive database operations — REST branch delete, snapshot restore, any reset — require explicit user confirmation first. The body must not present snapshot restore as a routine production-rollback lever.
10. Pin: drizzle-orm and drizzle-kit must be installed from @beta — latest lacks the drizzle-orm/netlify-db adapter and will fail. The body may not soften this to a recommendation.