MYSQL query in PHP is deleting all the rows in my table - php

Question

I'm working on a PHP script that uses delete and I only want to delete 1 row. But everytime I tried to delete 1 row, the SQL executes but deletes the entire rows in the table.
The following is my PHP script
<table>
<tr>
<th>No.</th>
<th>Publisher Code</th>
<th>Publisher Name</th>
<th>City</th>
<th> </th>
</tr>
<!-- PHP FETCH/RETRIEVE FROM DB -->
<?php
include_once 'dbconnect.php';
$sql = mysqli_query($conn, "SELECT * FROM tbl_publisher");
$ctr = 1;
$record = mysqli_num_rows($sql);
if ($record > 0) {
while ($record = mysqli_fetch_array($sql)) {
?>
<tr>
<td> <?php echo $ctr++ ?> </td>
<td> <?php echo $record['TBL_PUBLISHER_CODE']; ?> </td>
<td> <?php echo $record['TBL_PUBLISHER_NAME']; ?> </td>
<td> <?php echo $record['CITY']; ?> </td>
<td id="actions">
<center>
Delete
</center>
</td>
</tr>
<!-- closing tag for php script -->
<?php
}
}
?>
<!-- -->
</table>
and below is my delete.php
if(isset($_GET['del-pub']))
{
$row = intval($_GET['del-pub']);
$sql = mysqli_query($conn,"DELETE FROM tbl_publisher WHERE TBL_PUBLISHER_CODE = $row;");
if ($sql) {
header("Location: publisher.php");
}
else {
echo "<script>alert('Publisher was not deleted.');</script>";
header("Location: publisher.php");
}
}
I want to know how to delete only the 1 row. But it keeps deleting the entire rows in the table.

Answer 1

After dumping the contents of $sql, I found out that my sql syntax is the culprit.
Since TBL_PUBLISHER_CODE uses char as ID. Instead of doing "="
DELETE FROM tbl_publisher WHERE TBL_PUBLISHER_CODE = $row;
I used
DELETE FROM tbl_publisher WHERE TBL_PUBLISHER_CODE LIKE '".$row."'