Meagan Frost Meagan Frost - 4 months ago 8
SQL Question

Having error in deletion of data in my database via php

I am trying to delete information from a database via a php script but am am getting an error.

When we enter the employee ID, the ID should be deleted. However, it doesn't delete and I get an error.

<html>
<head>
<title>Delete a Record from MySQL Database</title>
</head>
<body>

<?php
if (isset($_POST['delete'])) {
$dbhost = 'localhost';
$dbuser = 'root';
$dbpass = '';
$conn = mysql_connect($dbhost, $dbuser, $dbpass);
if (!$conn) {
die('Could not connect: ' . mysql_error());
}

$emp_id = $_POST['emp_id'];

$sql = "DELETE employee " .
"WHERE emp_id = $emp_id";

mysql_select_db('test');
$retval = mysql_query($sql, $conn);
if (!$retval) {
die('Could not delete data: ' . mysql_error());
}
echo "Deleted data successfully\n";
mysql_close($conn);
} else { ?>
<form method="post" action="<?php $_PHP_SELF ?>">
<table width="400" border="0" cellspacing="1" cellpadding="2">
<tr>
<td width="100">Employee ID</td>
<td><input name="emp_id" type="text" id="emp_id"></td>
</tr>
<tr>
<td width="100"></td>
<td></td>
</tr>
<tr>
<td width="100"></td>
<td>
<input name="delete" type="submit" id="delete"
value="Delete">
</td>
</tr>
</table>
</form>
<?php } ?>
</body>


The error I get is:


Could not delete data: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE emp_id = 1' at line 1

Answer

The right syntax is here: http://dev.mysql.com/doc/refman/5.0/en/delete.html

You need to say delete from

$sql = "DELETE **from** employee ".
   "WHERE emp_id = $emp_id" ;