Node.js - MySQL BETWEEN clause

In this article, we would like to show you how to use SQL BETWEEN clause in Node.js.

Note: at the end of this article you can find database preparation SQL queries, you will also find an example of a more parameterized query there.

Between clause example

const mysql = require('mysql');

const connection = mysql.createConnection({               // gets connection with database
    host: 'localhost',  // '127.0.0.1'
    user: 'root',
    password: 'password',
    database: 'database_name',
});

connection.connect((error) => {
    if (error) throw error;
    const query = 'SELECT * FROM `users` ' +
                  'WHERE `id` BETWEEN ? AND ?';
    const values = [2, 4];                                // id >= 2 AND id <= 4

    connection.query(query, values, (error, result) => {  // sends queries
        connection.end();                                 // closes connection 
        if (error) throw error;
        console.log(result);
    });
});

Result: 

[
    { id: 2, name: 'Chris', role: 'moderator' },
    { id: 3, name: 'Kate',  role: 'user' },
    { id: 4, name: 'Denis', role: 'moderator' }
]

Note: 

BETWEEN clause is used very often for dates.

Database preparation

create_tables.sql file:

CREATE TABLE `users` (
	`id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
	`name` VARCHAR(100) NOT NULL,
	`role` VARCHAR(15) NOT NULL,
	PRIMARY KEY (`id`)
)
ENGINE=InnoDB;

insert_data.sql file:

INSERT INTO `users`
	(`name`, `role`)
VALUES
	('John', 'admin'),
	('Chris', 'moderator'),
	('Kate', 'user'),
	('Denis', 'moderator');

More parameterized query

// ...
connection.connect((error) => {
    if (error) throw error;
    const query = `SELECT * 
                   FROM ??
                   WHERE ?? BETWEEN ? AND ?`;
    const values = ['users', 'id', 2, 4];      // id >= 2 AND id <= 4

    connection.query(query, values, (error, result) => {  // sends queries
        connection.end();                                 // closes connection 
        if (error) throw error;
        console.log(connection.sql);           // SELECT * 
    });                                        // FROM `users`
});                                            // WHERE `id` BETWEEN '2' AND '4'

The names of columns and tables can be placed in the query by a double question mark ??.