Node.js MySQL CHAR_LENGTH() Function
Last Updated :
17 Feb, 2021
CHAR_LENGTH() function is a built-in function in MySQL that is used to get a number of characters in a given string.
Syntax:
CHAR_LENGTH(input_string)
Parameters: It takes one parameter as follows:
- input_string: It is the given string whose length is to be determined.
Return Value: It returns a number of characters in a given string.
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.connect((err) => {
if (err) {
console.log( "Database Connection Failed !!!" , err);
return ;
}
console.log( "We are connected to gfg_db database" );
let query = "SELECT name, CHAR_LENGTH(name)
AS name_length 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.connect((err) => {
if (err) {
console.log( "Database Connection Failed !!!" , err);
return ;
}
console.log( "We are connected to gfg_db database" );
let query = "SELECT salary, CHAR_LENGTH(salary)
AS salary_length 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:
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