Have you worked with the Sequelize ORM library for databases?

Yes, I have experience working with the Sequelize ORM library. Sequelize is a popular ORM for Node.js that allows working with relational databases (PostgreSQL, MySQL, SQLite, etc.) through an object-oriented interface.

With Sequelize, you can define models, establish relationships between them, perform database queries without writing raw SQL, which speeds up development and improves code readability.

Example of defining a model and creating a record:

const { Sequelize, DataTypes } = require('sequelize');
const sequelize = new Sequelize('sqlite::memory:');

const User = sequelize.define('User', {
  username: DataTypes.STRING,
  birthday: DataTypes.DATE
});

(async () => {
  await sequelize.sync();
  const user = await User.create({
    username: 'johndoe',
    birthday: new Date(1990, 1, 1)
  });
  console.log(user.toJSON());
})();

Sequelize supports migrations, validation, transactions, and other useful features for database interaction.