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:

snippet
var mysql = require('mysql');
var con = mysql.createConnection({
host: "localhost",
user: "root",
password: "12345",
database: "javatpoint"
});
con.connect(function(err) {
if (err) throw err;
var sql = "UPDATE employees SET city = 'Delhi' WHERE city = 'Allahabad'";
con.query(sql, function (err, result) {
if (err) throw err;
console.log(result.affectedRows + " record(s) updated");
});
});

Now open command terminal and run the following command:

snippet
Node update.js

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

Node.js update record 1

You can check the updated record in the new table:

Node.js update record 2

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

Node.js update record 3
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