supabase/apps/docs/content/guides/database/postgres-js.mdx

---
id: 'postgres-js'
title: 'Postgres.js'
description: 'Postgres.js Quickstart'
breadcrumb: 'ORM Quickstarts'
hideToc: true
---

## Connecting with Postgres.js

[Postgres.js](https://github.com/porsager/postgres) is a full-featured Postgres client for Node.js and Deno.

<StepHikeCompact>

  <StepHikeCompact.Step step={1}>

    <StepHikeCompact.Details title="Install">

    Install Postgres.js and related dependencies.

    </StepHikeCompact.Details>

    <StepHikeCompact.Code>

     ```shell
     npm i postgres
     ```

    </StepHikeCompact.Code>

  </StepHikeCompact.Step>

  <StepHikeCompact.Step step={2}>

    <StepHikeCompact.Details title="Connect">

    Create a `db.js` file with the connection details.

    To get your connection details, go to the [**Connect** panel](/dashboard/project/_?showConnect=true). Choose [**Transaction pooler**](/dashboard/project/_?showConnect=true&method=transaction) if you're on a platform with transient connections, such as a serverless function, and [**Session pooler**](/dashboard/project/_?showConnect=true&method=session) if you have a long-lived connection. Copy the URI and save it as the environment variable `DATABASE_URL`.

    <Admonition type="caution">

    `postgres.js` pipelines queries by default. Combined with the [shared pooler transaction mode](/docs/guides/database/connecting-to-postgres#pooler-transaction-mode), this can hang queries or return mismatched rows. `postgres.js` has no working option to turn pipelining off directly: `max_pipeline: 0` breaks `sql.begin()` transactions instead, a known upstream [bug](https://github.com/porsager/postgres/issues/1189).

    For more about pipelining with `postgres.js`, [contact support](/dashboard/support/new).

    </Admonition>

    </StepHikeCompact.Details>

    <StepHikeCompact.Code>

    ```ts
    // db.js
    import postgres from 'postgres'

    const connectionString = process.env.DATABASE_URL
    const sql = postgres(connectionString, { prepare: false })

    export default sql
    ```

    </StepHikeCompact.Code>

  </StepHikeCompact.Step>

  <StepHikeCompact.Step step={3}>

    <StepHikeCompact.Details title="Execute commands">

    Use the connection to execute commands.

    </StepHikeCompact.Details>

    <StepHikeCompact.Code>

    ```ts
    import sql from './db.js'

    async function getUsersOver(age) {
      const users = await sql`
        select name, age
        from users
        where age > ${ age }
      `
      // users = Result [{ name: "Walter", age: 80 }, { name: 'Murray', age: 68 }, ...]
      return users
    }
    ```

    </StepHikeCompact.Code>

  </StepHikeCompact.Step>

</StepHikeCompact>