Code Quality Rank: L4
Monthly Downloads: 0
Programming language: JavaScript
License: MIT License
Tags: Database     Query Builder     Sqlite3     MySQL     Postgresql     Query     SQL     Mssql     Oracle     Mariadb    
Latest version: v2.3.0

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A SQL query builder that is flexible, portable, and fun to use!

A batteries-included, multi-dialect (PostgreSQL, MySQL, CockroachDB, MSSQL, SQLite3, Oracle (including Oracle Wallet Authentication)) query builder for Node.js, featuring:

Node.js versions 12+ are supported.

You can report bugs and discuss features on the GitHub issues page or send tweets to @kibertoad.

For support and questions, join our Gitter channel.

For knex-based Object Relational Mapper, see:

To see the SQL that Knex will generate for a given query, you can use Knex Query Lab


We have several examples on the website. Here is the first one to get you started:

const knex = require('knex')({
  client: 'sqlite3',
  connection: {
    filename: './data.db',

try {

  // Create a table
  await knex.schema
    .createTable('users', table => {
    // ...and another
    .createTable('accounts', table => {

  // Then query the table...
  const insertedRows = await knex('users').insert({ user_name: 'Tim' })

  // ...and using the insert id, insert into the other table.
  await knex('accounts').insert({ account_name: 'knex', user_id: insertedRows[0] })

  // Query both of the rows.
  const selectedRows = await knex('users')
    .join('accounts', 'users.id', 'accounts.user_id')
    .select('users.user_name as user', 'accounts.account_name as account')

  // map over the results
  const enrichedRows = selectedRows.map(row => ({ ...row, active: true }))

  // Finally, add a catch statement
} catch(e) {

TypeScript example

import { Knex, knex } from 'knex'

interface User {
  id: number;
  age: number;
  name: string;
  active: boolean;
  departmentId: number;

const config: Knex.Config = {
  client: 'sqlite3',
  connection: {
    filename: './data.db',

const knexInstance = knex(config);

try {
  const users = await knex<User>('users').select('id', 'age');
} catch (err) {
  // error handling

Usage as ESM module

If you are launching your Node application with --experimental-modules, knex.mjs should be picked up automatically and named ESM import should work out-of-the-box. Otherwise, if you want to use named imports, you'll have to import knex like this:

import { knex } from 'knex/knex.mjs'

You can also just do the default import:

import knex from 'knex'

If you are not using TypeScript and would like the IntelliSense of your IDE to work correctly, it is recommended to set the type explicitly:

 * @type {Knex}
const database = knex({
    client: 'mysql',
    connection: {
      host : '',
      user : 'your_database_user',
      password : 'your_database_password',
      database : 'myapp_test'