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A query builder for PostgreSQL, MySQL and SQLite3, designed to be flexible, portable, and fun to use.

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

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

Node.js versions 10+ are supported.

Read the full documentation to get started!
Or check out our Recipes wiki to search for solutions to some specific problems
If upgrading from older version, see Upgrading instructions

For support and questions, join the

channel on freenode IRC

For an Object Relational Mapper, see:


To see the SQL that Knex will generate for a given query, see: 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',

// Create a table knex.schema .createTable('users', table => { table.increments('id'); table.string('user_name'); })

// ...and another .createTable('accounts', table => { table.increments('id'); table.string('account_name'); table .integer('user_id') .unsigned() .references(''); })

// Then query the table... .then(() => knex('users').insert({ user_name: 'Tim' }) )

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

// Query both of the rows. .then(() => knex('users') .join('accounts', '', 'accounts.user_id') .select('users.user_name as user', 'accounts.account_name as account') )

// map over the results .then(rows => => { console.log(row) }) )

// Finally, add a .catch handler for the promise chain .catch(e => { console.error(e); });

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