netlify-database（网络化数据库）

Netlify Database

Netlify Database is the managed Postgres product built into the Netlify platform. It is GA and is the default choice for any dynamic data in a Netlify project.

Install @netlify/database and Netlify auto-provisions a Postgres database for the site at deploy time. Each deploy preview gets its own isolated branch forked from production data. No Neon account, connection-string wiring, or claim flow — the database is a first-class Netlify primitive.

Database vs Blobs

Use Netlify Database for anything dynamic:

• Any user-generated or app-generated records (posts, comments, orders, sessions, audit logs)
• Structured data that will grow, be queried, or be joined
• Key-value-style data read or written by application code at runtime

Use Netlify Blobs only for file and asset storage: images, documents, exports, uploads, cached binary artifacts. Do not use Blobs as a dynamic data store — reach for Database instead. See netlify-blobs/SKILL.md.

CRITICAL: Install Drizzle from the @beta dist-tag

The Netlify Database adapter for Drizzle ORM currently only exists on the beta release line of drizzle-orm. Install both drizzle-orm and drizzle-kit from the @beta dist-tag:

npm install drizzle-orm@beta
npm install -D drizzle-kit@beta

The default latest versions do not include the drizzle-orm/netlify-db adapter and will fail. If drizzle-kit generate errors about being outdated, or the drizzle-orm/netlify-db import fails to resolve, the install is missing @beta.

The @beta tag only affects the installed version — imports are written as drizzle-orm, drizzle-orm/pg-core, and drizzle-orm/netlify-db without modification.

CRITICAL: Use the Netlify CLI for database operations

The CLI ships a complete database surface under netlify database (alias: netlify db) that replaces hand-rolled scripts and direct API/UI work. Reach for these commands first before writing custom tooling. Requires Netlify CLI 26.0.0+ — if a netlify database subcommand isn't recognized, run npm install -g netlify-cli@latest.

Full reference is in Netlify CLI commands below.

CRITICAL: Never apply migrations to a Netlify-hosted database

The only database you ever apply migrations to yourself is the local development DB. For any Netlify-hosted database — production or a deploy preview branch — Netlify applies migrations automatically during the deploy. Your job is to create migration files and commit them. The deploy does the rest.

This means:

• Use netlify database migrations apply for the local DB. Do NOT run drizzle-kit migrate against NETLIFY_DB_URL in any context.
• Do NOT run drizzle-kit push at all. Generate a migration and let the deploy apply it.
• Do NOT run raw DDL (CREATE, ALTER, DROP, TRUNCATE) via netlify database connect, psql, or any other direct connection. Schema changes go through migration files; out-of-band DDL drifts the migration history from the actual schema.
• Do NOT export NETLIFY_DB_URL from a preview or production context and run a client against it. Migrations drift the moment anything touches the schema out-of-band.

The one documented exception is a one-time data import during a provider switch — see references/migration-from-extension.md. Outside that specific flow, the rule is absolute: schema changes go through migration files, migration files get applied by the deploy.

Not the legacy "Netlify DB" extension

The older Netlify DB extension (Beta) is deprecated. It is a separate product and must not be confused with Netlify Database. Do not recommend or install it for new projects.

If an existing project is already using the @netlify/neon extension, keep it working and encourage the user to switch. See references/legacy-extension.md for recognition and coexistence, and references/migration-from-extension.md for the full switching process (also covers switching from other external Postgres providers).

Provisioning

The fastest path is netlify database init — an interactive setup that installs @netlify/database, lets the user pick Drizzle or raw SQL, writes drizzle.config.ts if needed, scaffolds a starter migration, applies it locally, and runs a sample query end-to-end:

netlify database init           # interactive
netlify database init --yes     # accept defaults — for CI/agents

If you'd rather wire things up by hand, install the package directly:

npm install @netlify/database

Either way, presence of @netlify/database in the dependency tree triggers provisioning on the next deploy. A database can also be created manually from the Netlify UI before first deploy.

Drizzle ORM (recommended path)

Drizzle is the recommended way to work with Netlify Database. Prefer Drizzle over writing raw SQL or hand-editing migration files — manual migrations are an edge case (see references/migrations.md).

Install

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

Schema file

Create db/schema.ts. Define all tables here using Drizzle's schema builder.

// db/schema.ts
import { boolean, pgTable, serial, text, timestamp, varchar } from "drizzle-orm/pg-core";

export const items = pgTable("items", {
  id: serial().primaryKey(),
  title: varchar({ length: 255 }).notNull(),
  description: text(),
  isActive: boolean("is_active").notNull().default(true),
  createdAt: timestamp("created_at").defaultNow(),
  updatedAt: timestamp("updated_at").defaultNow(),
});

export type Item = typeof items.$inferSelect;
export type NewItem = typeof items.$inferInsert;

Use snake_case strings for column names ("is_active", "created_at") to match Postgres conventions. Drizzle variable names can be camelCase.

Drizzle client

Create db/index.ts. The adapter on drizzle-orm/netlify-db picks the right driver for the runtime automatically.

// db/index.ts
import { drizzle } from "drizzle-orm/netlify-db";
import * as schema from "./schema";

export const db = drizzle({ schema });

The connection is configured automatically — no connection string needed. If your project uses native ESM with .js extensions on relative imports (from "./schema.js"), keep that style consistent here.

Drizzle Kit config

Create drizzle.config.ts at the project root. Set out to netlify/database/migrations — that's the directory the deploy applies migrations from:

// drizzle.config.ts
import { defineConfig } from "drizzle-kit";

export default defineConfig({
  dialect: "postgresql",
  schema: "./db/schema.ts",
  out: "netlify/database/migrations",
  migrations: { prefix: "timestamp" },
});

Default to migrations: {prefix: "timestamp"}. Drizzle Kit's default sequential indices (0000_, 0001_, …) collide whenever two pieces of work generate migrations in parallel — this happens to teams and to solo developers iterating on multiple branches. Timestamp prefixes keep filenames unique and order stable. If a project is already established on sequential prefixes, leave it alone, but expect collisions when working in parallel.

Package scripts

{
  "scripts": {
    "db:generate": "drizzle-kit generate",
    "db:migrate": "netlify database migrations apply"
  }
}

• db:generate writes a new migration file under netlify/database/migrations/ from the current schema.
• db:migrate applies pending migrations to the local development database only, via the CLI. Hosted migrations (preview branches, production) are applied by the deploy — never by this script.

Schema-change workflow

1. Edit db/schema.ts.
2. npm run db:generate — writes a new file into netlify/database/migrations/.
3. Review the SQL.
4. npm run db:migrate — applies it to the local development DB for testing.
5. Commit the schema change and migration file together and push. The deploy applies the migration to the preview branch, then to production on publish.

Query patterns

import { db } from "./db";
import { items } from "./db/schema";
import { eq, desc } from "drizzle-orm";

// Select all
const all = await db.select().from(items);

// Select with condition
const [one] = await db.select().from(items).where(eq(items.id, id)).limit(1);

// Ordering and limit
const recent = await db.select().from(items).orderBy(desc(items.createdAt)).limit(10);

// Insert
const [created] = await db.insert(items).values({ title: "New" }).returning();

// Update
const [updated] = await db.update(items).set({ title: "Updated" }).where(eq(items.id, id)).returning();

// Delete
await db.delete(items).where(eq(items.id, id));

Full migration workflow, expand-and-contract for breaking schema changes, and production DML migrations are in references/migrations.md.

Native driver (when Drizzle isn't a fit)

When a project wants raw SQL, uses a different query builder (Kysely, etc.), or has a library that needs a pg.Pool, use the native driver exposed by @netlify/database.

npm install @netlify/database

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

const db = getDatabase();

// Tagged template — parameters are safely bound, not interpolated
const users = await db.sql`SELECT * FROM users WHERE active = ${true}`;

// Insert with RETURNING
const [user] = await db.sql`
  INSERT INTO users (name, email)
  VALUES (${name}, ${email})
  RETURNING *
`;

// Bulk insert
const rows = db.sql.values([
  ["Ada", "ada@example.com"],
  ["Bob", "bob@example.com"],
]);
await db.sql`INSERT INTO users (name, email) VALUES ${rows}`;

Transactions go through db.pool so BEGIN, the queries, and COMMIT/ROLLBACK all run on the same connection:

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

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

For third-party tools that need a raw connection string, import getConnectionString from @netlify/database — but prefer getDatabase() for application code.

Manual migrations

With the native driver, scaffold migration files via the CLI:

netlify database migrations new -d "create users table"

This creates netlify/database/migrations/<prefix>_<slug>/migration.sql and prompts for the numbering scheme if it can't be detected from existing files. Open the file and write the SQL. The CLI auto-detects an existing scheme; for new projects it'll ask — choose timestamp unless you have a reason not to.

You can also write the file by hand if you prefer. Two layouts are supported:

• Flat: netlify/database/migrations/<prefix>_<slug>.sql
• Subdirectory: netlify/database/migrations/<prefix>_<slug>/migration.sql (what migrations new produces)

In both, <prefix> is digits (timestamp like 20260417143022 or sequential like 0001) and <slug> is lowercase letters, numbers, hyphens, or underscores. Files apply in lexicographic order. See references/migrations.md.

Once a migration has been applied to any database, never modify it — roll forward with a new migration instead.

Connection — don't reach for the env var

NETLIFY_DB_URL is set automatically across builds, functions, edge functions, and local dev. Use the getDatabase() / getConnectionString() helpers above rather than reading it directly — only reach for the raw env var for third-party tools that demand a bare string.

NETLIFY_DB_URL is intentionally different from the legacy extension's NETLIFY_DATABASE_URL. The two coexist so a project mid-migration doesn't break. Don't rename between them.

Preview branching

Each deploy preview runs against its own database branch forked from production data. Schema and data changes in a preview do not affect production until the branch is merged and published. This means:

• Migrations run against the preview branch first — failures fail the preview, not production.
• Ad-hoc edits in a preview (via the Netlify UI data browser or a direct client) do not propagate to production. Always express production changes as migrations.

Production data changes — write a DML migration

When a user asks for data changes that should land in production (seed data, backfills, one-off cleanups, CSV imports), do not connect to the production database and run queries. Generate a DML migration in netlify/database/migrations/ (SQL INSERT/UPDATE/DELETE, or a Drizzle-generated equivalent). Tell the user you created a data migration and that merging to production will apply it. Let them verify in the preview branch first.

If the request is ambiguous ("update this record"), confirm that the user wants a production migration rather than a preview-only edit. See references/migrations.md.

Netlify CLI commands for Netlify Database

The CLI ships a complete database surface under netlify database (alias: netlify db). Requires CLI 26.0.0+. Most commands accept --json for machine-readable output — useful when scripting or reading results from an agent.

netlify database init

Interactive bootstrap: installs @netlify/database (and Drizzle if chosen), writes drizzle.config.ts, scaffolds and applies a starter migration, and runs a sample query. Use --yes for non-interactive mode.

netlify database status

Reports whether the database is enabled, whether @netlify/database is installed, the connection string for the active branch, and the applied/pending/missing/out-of-order migrations. Defaults to the local development database — pass --branch <name> to target a remote preview or production branch.

netlify database status                          # local
netlify database status --branch my-feature      # remote branch
netlify database status --json
netlify database status --show-credentials       # include username/password in connection string

netlify database connect

Connects to the database. Defaults to an interactive REPL — for agent and script use, always pass --query for one-shot execution:

# List tables
netlify database connect --query "SELECT table_name FROM information_schema.tables WHERE table_schema = 'public'"

# Inspect columns
netlify database connect --query "SELECT column_name, data_type, is_nullable FROM information_schema.columns WHERE table_name = 'items'"

# JSON output
netlify database connect --query "SELECT * FROM items LIMIT 10" --json

# Get connection details only (no query)
netlify database connect --json

Never run DDL (CREATE, ALTER, DROP, TRUNCATE) through netlify database connect, psql, or any other direct connection. Schema changes go through migration files — out-of-band DDL drifts the migration history from the actual schema.

netlify database migrations new

Scaffolds a new migration file as netlify/database/migrations/<prefix>_<slug>/migration.sql. Auto-detects the numbering scheme from existing files; prompts when undetermined.

netlify database migrations new -d "add users table"
netlify database migrations new -d "add users table" --scheme timestamp

netlify database migrations apply

Applies pending migrations to the local development database. The CLI does not apply migrations to the local DB automatically when netlify dev starts — you run this command yourself when you're ready. Hosted databases (preview branches, production) are handled by the deploy.

netlify database migrations apply
netlify database migrations apply --to <name>   # apply up to a specific migration

netlify database migrations pull

Downloads migration files from a remote branch (defaults to production) and overwrites local files. Useful when local migration history has drifted from production — for example, after another contributor shipped a migration you don't have locally.

netlify database migrations pull                  # from production
netlify database migrations pull --branch staging # from a specific branch
netlify database migrations pull --branch         # from your current local git branch
netlify database migrations pull --force          # skip the overwrite confirmation

netlify database migrations reset

Deletes local migration files that have not yet been applied to the target database. Applied migrations and their data are left alone — the command can't undo something already applied.

Typical use: you generated a migration, realized it was wrong, and want to start over. Run reset, update db/schema.ts, then npm run db:generate produces a fresh migration.

netlify database migrations reset                  # against local dev DB
netlify database migrations reset --branch <name>  # against a remote branch

netlify database reset

Wipes the local development database — drops all schemas and tables. Only affects the local DB; never touches preview branches or production. Use this when you want to replay all migrations from scratch.

netlify database reset

Iterating on migrations

When a migration you generated needs to change, what you do depends on whether it's been applied anywhere yet:

• Already applied to any database (local dev DB, a preview branch, or production) → treat as immutable. Roll forward with a new migration that applies the correction.
• Only on disk (not yet applied anywhere) → don't edit the SQL or snapshot files by hand. Run netlify database migrations reset, update db/schema.ts, then re-run npm run db:generate. Hand-editing desyncs Drizzle Kit's internal state and tends to produce broken migrations on the next generate.

Local development

netlify dev runs the project against a local Postgres-compatible database — no remote connection, no risk of touching production. Use netlify database migrations apply to apply pending migrations locally, netlify database connect to query, and netlify database reset to wipe and replay. See references/local-dev.md.

Common mistakes

1. Forgetting the @beta dist-tag. drizzle-orm and drizzle-kit must be installed as @beta. The latest releases lack the drizzle-orm/netlify-db adapter.
2. Wrong migration output directory. Drizzle Kit defaults to drizzle/. Set out: "netlify/database/migrations" in drizzle.config.ts — migrations outside that directory are not applied by the deploy.
3. Writing raw CREATE TABLE when using Drizzle. The schema file is the source of truth. Define tables in db/schema.ts and generate migrations.
4. Running drizzle-kit migrate or push against a hosted DB. Never. The deploy applies migrations. For local, use netlify database migrations apply instead.
5. Using netlify database connect to change schema. Schema changes go through migration files — never DDL through connect or any direct connection.
6. Misunderstanding netlify database migrations reset. It only deletes unapplied files. It cannot undo an applied migration — for that, roll forward with a new migration.
7. Assuming netlify dev applies migrations automatically. It doesn't — only the deploy does. Run netlify database migrations apply locally yourself.