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The DELETE statement is used to delete records from a table
The DELETE statement is used to delete records from a table:
Notice the WHERE clause in the DELETE syntax: The WHERE clause specifies which record or records that should be deleted. If you omit the WHERE clause, all records will be deleted!
To learn more about SQL, please visit our SQL tutorial.
Let's look at the "MyGuests" table:
id | firstname | lastname | 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 |
3 | Julie | Dooley | julie@example.com | 2014-10-26 10:48:23 |
The following examples delete the record with id=3 in the "MyGuests" table:
<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
// sql to delete a record
$sql = "DELETE FROM MyGuests WHERE id=3";
if ($conn->query($sql) === TRUE) {
echo "Record deleted successfully";
} else {
echo "Error deleting record: " . $conn->error;
}
$conn->close();
?>
<?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 to delete a record
$sql = "DELETE FROM MyGuests WHERE id=3";
if (mysqli_query($conn, $sql)) {
echo "Record deleted successfully";
} else {
echo "Error deleting record: " . mysqli_error($conn);
}
mysqli_close($conn);
?>
<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDBPDO";
try {
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
// set the PDO error mode to exception
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
// sql to delete a record
$sql = "DELETE FROM MyGuests WHERE id=3";
// use exec() because no results are returned
$conn->exec($sql);
echo "Record deleted successfully";
} catch(PDOException $e) {
echo $sql . "<br>" . $e->getMessage();
}
$conn = null;
?>
After the record is deleted, the table will look like this:
id | firstname | lastname | 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 |