Node.js MySQL CONCAT_WS() Function
CONCAT_WS() function is a built-in function in MySQL that is used to concatenate a set of strings with a commonly given separator.
Syntax:
CONCAT_WS(separator, string_1, string_2, ...)
Parameters: It takes two parameters as follows:
- separator: This separator will be used to concatenate strings.
- string: It is the set of given input strings separated by comma(‘,’).
Return Value: It returns a string which is the concatenation of a set of strings with common given separator.
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 CONCAT_WS(' # ', 'Geeks', 'for', 'Geeks') AS Output" ;
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 CONCAT_WS(': $', name, salary) AS Info 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:
Last Updated :
17 Feb, 2021
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