Sequelize max - JavaScript

Sequelize max is a function provided by Sequelize ORM (Object Relational Mapper), which is an object-relational mapping library for Node.js, written in JavaScript. This function allows developers to find the maximum value of a specific column in a selected table in the database.

Installation

To use Sequelize max function in your Node.js project, you need to install the Sequelize library through npm (Node Package Manager) by running the following command in your terminal:

npm install sequelize

Usage

You first need to import the Sequelize library and create a Sequelize instance. Then, you can define a model for the table you want to query using the sequelize.define() method. Finally, you can use Sequelize max function to find the maximum value of a specific column in that table. Here is an example code snippet:

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

const sequelize = new Sequelize('database_name', 'username', 'password', {
  host: 'localhost',
  dialect: 'mysql'
});

const User = sequelize.define('User', {
  name: DataTypes.STRING,
  age: DataTypes.INTEGER,
  salary: DataTypes.DOUBLE
});

(async () => {
  const maxSalary = await User.max('salary');
  console.log(maxSalary);
})();

In this example, we define a User model with columns name, age, and salary. We then call Sequelize max function with the column name salary as a parameter to find the highest salary among all users in the User table of the database. We use an async function to wait for the result of the query and log the maximum salary to the console.

Conclusion

Sequelize max function is a handy tool for developers to find the maximum value of a column in a table efficiently. With its easy-to-use interface, it saves time and makes database queries a breeze.