Node.js MySQL Update Records

The UPDATE command is used to update records in the table.

Example

Update city in "employees" table where id is 1.

Create a js file named "update" in DBexample folder and put the following data into it:

1. var mysql = require('mysql');  
2. var con = mysql.createConnection({  
3. host: "localhost",  
4. user: "root",  
5. password: "12345",  
6. database: "javatpoint"  
7. });  
8. con.connect(function(err) {  
9. if (err) throw err;  
10. var sql = "UPDATE employees SET city = 'Delhi' WHERE city = 'Allahabad'";  
11. con.query(sql, function (err, result) {  
12. if (err) throw err;  
13. console.log(result.affectedRows + " record(s) updated");  
14. });  
15. });  

Now open command terminal and run the following command:

1. Node update.js  

It will change the city of the id 1 is to Delhi which is prior Allahabad.

You can check the updated record in the new table:

In the old table city of "Ajeet Kumar" is Allahabad.