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NodeJS MySQL LENGTH() Function
  • Last Updated : 18 Feb, 2021

LENGTH() Function is a Builtin function in MySQL which is used to get length of given string in bytes.

Syntax:

LENGTH(input_string)

Parameters: LENGTH() function accepts a single parameter as mentioned above and described below.

  • input_string: We will get number of characters of this string

Return Value: LENGTH() function returns length of given string in bytes.

Modules:

  • mysql: To handle MySQL Connection and Queries
npm install mysql

SQL publishers Table Preview:



Example 1:

Javascript




const mysql = require("mysql");
  
let db_con = mysql.createConnection({
  host: "localhost",
  user: "root",
  password: "",
  database: "gfg_db",
});
  
db_con.connect((err) => {
  if (err) {
    console.log("Database Connection Failed !!!", err);
    return;
  }
  
  console.log("We are connected to gfg_db database");
  
  // here is the query
  let query = `SELECT LENGTH('Geeks for Geeks') AS length_in_bytes`;
  
  db_con.query(query, (err, rows) => {
    if (err) throw err;
  
    console.log(rows);
  });
});

Output:

Example 2:

Javascript




const mysql = require("mysql");
  
let db_con = mysql.createConnection({
  host: "localhost",
  user: "root",
  password: "",
  database: "gfg_db",
});
  
db_con.connect((err) => {
  if (err) {
    console.log("Database Connection Failed !!!", err);
    return;
  }
  
  console.log("We are connected to gfg_db database");
  
  // here is the query
  let query = `SELECT name, LENGTH(name) AS length_in_bytes FROM publishers`;
  
  db_con.query(query, (err, rows) => {
    if (err) throw err;
  
    console.log(rows);
  });
});

Output:

My Personal Notes arrow_drop_up
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