PHP - SPLessons

PHP Delete Data From MySQL

Chapter 38

SPLessons 5 Steps, 3 Clicks
5 Steps - 3 Clicks

PHP Delete Data From MySQL

PHP Delete Data From MySQL

shape Description

PHP Delete Data From MySQL shows how to delete data from database. To remove data/records from a single or multiple database tables, MySQL DELETE statement is used.

shape Syntax

DELETE FROM table [WHERE conditions] [ORDER BY …] [LIMIT rows]
  • DELETE FROM clause selects the table in which the records to be deleted.
  • WHERE clause denotes the rows that has to be deleted.If WHERE condition is satisfied, record is deleted from the table permanently otherwise, all the table records will be deleted.
  • ROW_COUNT() function is returned by DELETE statement which indicates the number of rows deleted.

shape Examples

MySQLi (Object-oriented)

[php]
<html>
<body>
<?php
$HostName = "localhost";
$UserName = "root";
$Password = "password";
$dbname="accounts";

// Create connection
$connection = new mysqli($HostName, $UserName, $Password, $dbname);

// Check connection
if ($connection->connect_error)
{
die("Connection failed: " . $connection->connect_error);
}

// sql to delete a record
$sql = "DELETE FROM users2 WHERE id=2";

if ($connection->query($sql) === TRUE) {
echo "Record deleted successfully";
} else {
echo "Error deleting record: " . $connection->error;
}

$connection->close();
?>
</body>
</html>

[/php]

The output will be “Record deleted successfully” and in phpmyadmin, the output will be like below.

MySQLi (Procedural)
[php]
<html>
<body>
<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "accounts";

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

// sql to delete a record
$sql = "DELETE FROM users2 WHERE id=2";

if (mysqli_query($connection, $sql)) {
echo "Record deleted successfully";
} else {
echo "Error deleting record: " . mysqli_error($connection);
}

mysqli_close($connection);
?>
</body>
</html>
[/php]

Summary

shape Key Points

  • MySQL deletes the records from a single table or multiple tables.
  • To delete the record, it uses the statement DELETE FROM.