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What is Knex.js and how do I use it with Node.js?

An example of an AI chatbot conversation about Knex.js, a SQL query builder for Node.js.

😀
You

What is Knex.js and how do I use it with Node.js?

MagicBuddy
MagicBuddy

Knex.js is a SQL query builder for Node.js, designed to be flexible and portable. You can use it to build complex SQL queries using a simple JavaScript syntax.

😀
You

Can you show me a basic example of how to set it up?

MagicBuddy
MagicBuddy

Sure! First, install Knex and a database driver, like pg for PostgreSQL. Then, initialize Knex in your project like this:

const knex = require('knex')({
  client: 'pg',
  connection: {
    host: '127.0.0.1',
    user: 'your_username',
    password: 'your_password',
    database: 'your_database'
  }
});
😀
You

How do I perform a simple SELECT query?

MagicBuddy
MagicBuddy

You can perform a SELECT query like this:

knex('users').select('*').then(rows => {
  console.log(rows);
});
``` This will fetch all records from the 'users' table.
😀
You

What about inserting data?

MagicBuddy
MagicBuddy

To insert data, you can use the insert method:

knex('users').insert({name: 'John Doe', email: '[email protected]'}).then(() => {
  console.log('Data inserted');
});
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