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 Superseded by @netlify/database.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