Update Data In a MySQL Table Using MySQLi in PHP

The UPDATE statement is used to update existing records in a table:

UPDATE table_name SET column1=value, column2=value2,... WHERE some_column=some_value

Notice:- The WHERE clause specifies which record or records that should be updated. If omit the WHERE clause, all records will be updated!

"MyGuests" table:

id	firstname	lastname	email	reg_date
1	John	Doe	john@example.com	2014-10-22 14:26:15
2	Mary	Moe	mary@example.com	2014-10-23 10:22:30

Example:- Update the record with id=2 in the "MyGuests" table:

Example (MySQLi Procedural)

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connection
if (!$conn) {
  die("Connection failed: " . mysqli_connect_error());
}

$sql = "UPDATE MyGuests SET lastname='Doe' WHERE id=2";

if (mysqli_query($conn, $sql)) {
  echo "Record updated successfully";
} else {
  echo "Error updating record: " . mysqli_error($conn);
}

mysqli_close($conn);
?>

Output:-

id	firstname	lastname	email	reg_date
1	John	Doe	john@example.com	2014-10-22 14:26:15
2	Mary	Doe	mary@example.com	2014-10-23 10:22:30

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DR. PANKAJ DADHICH

Update Data In a MySQL Table Using MySQLi in PHP