What is the procedure for using Sequelize's bulkCreate functionality?

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The procedure for using Sequelize's bulkCreate functionality is as follows:

1. First, create an array of objects that represent the records you want to create.

2. Initialize your Sequelize model with the appropriate table name and column names.

3. Call the bulkCreate method of your Sequelize model, passing the array of objects as an argument.

4. If needed, you can also pass additional options to the bulkCreate method, such as the validate option (which indicates whether to validate the records before creating them) or the returning option (which indicates which fields to return for each created record).

5. The bulkCreate method will create all the records in the database in a single database transaction, so either all records will be created successfully, or none will be created at all.

Example using Sequelize's bulkCreate:

const { sequelize, DataTypes } = require('sequelize');

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

const users = [
  { username: 'user1', email: 'user1@email.com' },
  { username: 'user2', email: 'user2@email.com' },
];

User.bulkCreate(users)
  .then(() => {
    console.log('Users created successfully!');
  })
  .catch((error) => {
    console.error('Error creating users:', error);
  });