Node.js MySQL SUM() Function
Last Updated :
07 Oct, 2021
Improve
We use the SUM() function in MySQL to get Sum of the value of some columns.
Syntax:
SUM(column_name)
Parameters: SUM() function accepts a single parameter as mentioned above and described below.
- column_name: Column’s name from which we have to return the max value.
Module Installation: Install the mysql module using the following command.
npm install mysql
Database: Our SQL publishers table preview with sample data is shown below:
Example 1:
index.js
const mysql = require("mysql"); let db_con = mysql.createConnection({ host: "localhost", user: "root", password: '', database: 'gfg_db'}); db_con.on('error', (err) => { console.log(err.code); }); db_con.connect((err) => { if (err) { console.log("Database Connection Failed !!!", err.code); return; } console.log("We are connected to gfg_db database"); // Here is the query let query = "SELECT SUM(salary) AS total_salary FROM publishers"; db_con.query(query, (err, rows) => { if(err) throw err; console.log(rows); }); }); |
Run the index.js file using the following command:
node index.js
Output:
Example 2:
index.js
const mysql = require("mysql"); let db_con = mysql.createConnection({ host: "localhost", user: "root", password: '', database: 'gfg_db'}); db_con.on('error', (err) => { console.log(err.code); }); db_con.connect((err) => { if (err) { console.log("Database Connection Failed !!!", err.code); return; } console.log("We are connected to gfg_db database"); // Here is the query let query = "SELECT SUM(salary) AS total_salary FROM publishers WHERE id BETWEEN 2 AND 7"; db_con.query(query, (err, rows) => { if(err) throw err; console.log(rows); }); }); |
Run the index.js file using the following command:
node index.js
Output:
