SQL Update unable to work - php

Question

I have a SQL update below and there's no error but it doesn't reflect any changes I have made to the database. I also paste here the 2 previous php which will lead to the update php. SQL query for UPDATE shows no error too.
Please let me know if i miss out anything.
Appreciate it very much.
table 1: nmc_cd
table 2: nmc_category
table 3: nmc_publisher
This is the php to display the list of CDs and the key here is the CDID which once selected will be sent to the next php.
include 'database_conn.php'; //make db connection
$sql = "SELECT nmc_cd.CDID, nmc_cd.CDTitle, nmc_cd.CDYear, nmc_cd.CDPrice, nmc_category.catDesc, nmc_cd.catID
FROM nmc_cd
LEFT JOIN nmc_category ON nmc_cd.catID=nmc_category.catID";
$queryresult = mysqli_query($conn, $sql)
or die (mysqli_error($conn));
echo'<table cellpadding="0" cellspacing="0" class="db-table" table align="center">';
echo"<tr><th>Music Title</th><th>Year</th><th>Price</th><th>Category</th></tr>";
while($row = mysqli_fetch_assoc($queryresult)) {
$iCDID = $row['CDID'];
$CDTitle = $row['CDTitle'];
$CDYear = $row['CDYear'];
$CDPrice = $row['CDPrice'];
$CDCat = $row['catDesc'];
$CDCatID = $row['catID'];
echo "<tr><td>";
echo "$CDTitle";
echo "</td><td>";
echo "<div align='center'>$CDYear</div>\n";
echo "</td><td>";
echo "<div align='center'>$CDPrice </div>\n";
echo "</td><td>";
echo "<div align='center'>$CDCat</div>\n";
echo "</TD></tr>";
}
echo "</table>";
mysqli_free_result($queryresult);
mysqli_close($conn);
?>
In this php it display the selected CD and editing is permitted
<?php
header('Content-type: text/html; charset=iso-8859-1'); //set the charset parameter
include 'database_conn.php'; //make db connection
$code = $_GET['itemCode']; //collect form data from user input
$sql = "SELECT nmc_cd.CDID, nmc_cd.CDTitle, nmc_cd.CDYear, nmc_cd.CDPrice, nmc_cd.catID, nmc_cd.pubID, nmc_category.catDesc, nmc_publisher.pubID, nmc_publisher.pubName
FROM nmc_cd
JOIN nmc_category on (nmc_cd.catID = nmc_category.catID)
JOIN nmc_publisher on (nmc_cd.pubID = nmc_publisher.pubID)
WHERE nmc_cd.CDID = '$code'"; //link user input with primary key
$queryresult = mysqli_query($conn, $sql)
or die (mysqli_error($conn));
$row = mysqli_fetch_assoc($queryresult); //function fetches result row
$iCDID = $row['CDID'];
$CDTitle = $row['CDTitle'];
$CDYear = $row['CDYear'];
$CDPrice = $row['CDPrice'];
$CDCat = $row['catDesc'];
$CDPub = $row['pubName'];
$CDpubID = $row['pubID'];
<form method="get" action="UpdateCD.php">
<div align="center">
<div>Title <input type = "text" name = "CDTitle" value = "<?php echo $CDTitle; ?>" /></div></br>
<div>Year <input type = "text" name = "CDYear" value = "<?php echo $CDYear; ?>" /></div></br>
<div>Price <input type = "text" name = "CDPrice" value = "<?php echo $CDPrice; ?>" /></div></br>
Category
<select name="CDCat">
<option value= " ">
<?php
include 'database_conn.php'; //make db connection
if (! ( is_object($conn ) && ( get_class( $conn ) == 'mysqli' ))) {
die("DB connection failure.");
}
$rsCDCat = mysqli_query($conn, "SELECT nmc_category.catDesc FROM nmc_category");
if ( !$rsCDCat ) {
die("No result from DB query."); //probably invalid SQL, table error
}
if ( $rsCDCat->num_rows < 1 ) {
die("No rows returned from DB query."); //query runs but nothing is found in DB to match
}
while($Catcatresult = mysqli_fetch_array($rsCDCat)){
$optioncat = "<option value='{$Catcatresult[0]}'";
if($Catcatresult[0] == $CDCat){
$optioncat .= " selected='selected'";
}
$optioncat .= ">{$Catcatresult[0]}</option>";
echo $optioncat;
}
?>
</select></br></br>
Publisher
<select name="CDPub">
<option value= " ">
<?php
include 'database_conn.php'; //make db connection
if (! ( is_object($conn ) && ( get_class( $conn ) == 'mysqli' ))) {
die("DB connection failure.");
}
$rsCDpub = mysqli_query($conn, "SELECT nmc_publisher.pubName FROM nmc_publisher");
if ( !$rsCDpub ) {
die("No result from DB query."); //probably invalid SQL, table error
}
if ( $rsCDpub->num_rows < 1 ) {
die("No rows returned from DB query."); //query runs but nothing is found in DB to match
}
while($Catpubresult = mysqli_fetch_array($rsCDpub)){
$option = "<option value='{$Catpubresult[0]}'";
if($Catpubresult[0] == $CDPub){
$option .= " selected='selected'";
}
$option .= ">{$Catpubresult[0]}</option>";
echo $option;
}
?></select></br></br>
<div><input type="submit" value="Update"></div>
</form>
In this update php, it gets the values from the previous php and update the table.
<?php
header('Content-type: text/html; charset=iso-8859-1');
include 'database_conn.php'; // make db connection
$pCDTitle = filter_has_var(INPUT_GET, 'CDTitle') ? $_GET['CDTitle']: null; // store all parameter in variable
$pCDPubName = filter_has_var(INPUT_GET, 'CDPub') ? $_GET['CDPub']: null;
$pCDYear = filter_has_var(INPUT_GET, 'CDYear') ? $_GET['CDYear']: null;
$pCDCategory = filter_has_var(INPUT_GET, 'CDCat') ? $_GET['CDCat']: null;
$pCDPrice = filter_has_var(INPUT_GET, 'CDPrice') ? $_GET['CDPrice']: null;
$pCDID = filter_has_var(INPUT_GET, 'CDID') ? $_GET['CDID']: null;
$pCDPubID = filter_has_var(INPUT_GET, 'pubID') ? $_GET['pubID']: null;
$sql = "UPDATE nmc_cd "
. "SET nmc_cd.CDTitle='$pCDTitle',nmc_cd.CDYear='$pCDYear',nmc_cd.CDPrice='$pCDPrice',nmc_cd.catID='$pCDCategory',nmc_cd.pubID='$pCDPubName'"
. "WHERE nmc_cd.CDID='$pCDID'";
if ($conn->query($sql) === TRUE) {
echo "<b><font face='verdana' font sise='3' color='red'>Record updated successfully</font></b>";
$sql = "SELECT * FROM nmc_cd "
. "JOIN nmc_category ON (nmc_cd.catID = nmc_category.catID)"
. "JOIN nmc_publisher ON (nmc_cd.pubID = nmc_publisher.pubID)"
. "WHERE nmc_cd.CDID = '$pCDID'"; //Query Database
$result = mysqli_query($conn, $sql);
$row = mysqli_fetch_assoc($result);
$CDID = $row['CDID'];
$CDTitle = $row['CDTitle'];
$CDYear = $row['CDYear'];
$CDPrice = $row['CDPrice'];
$catDesc = $row['CDCat'];
$pubName = $row['CDPub'];
$location = $row['location'];
echo "<table>";
echo "<tr><th>Title</th><th>Year</th><th>Price</th><th>Catergory</th><th>Publisher</th><th>Location</th></tr>";
echo "<tr><td>".$row["CDTitle"]."</td><td> ".$row["CDYear"]."</td><td> ".$row["CDPrice"]."</td><td> ".$row["CatCD"]."</td><td> ".$row["CatPub"]."</td><td> ".$row["location"]."</td></tr>"; //Display Data Table Data
echo "</table";
mysqli_close($conn);
} else {
echo "<b><font face='verdana' color='red'>Error updating record!!!</font></b>" . $conn->error;
}
?>

Answer 1

$sql = "UPDATE nmc_cd "
. "SET nmc_cd.CDTitle='$pCDTitle',nmc_cd.CDYear='$pCDYear',nmc_cd.CDPrice='$pCDPrice',nmc_cd.catID='$pCDCategory',nmc_cd.pubID='$pCDPubName'"
. "WHERE nmc_cd.CDID='$pCDID'";
Should be:
$sql = "UPDATE nmc_cd "
. "SET nmc_cd.CDTitle='$pCDTitle',nmc_cd.CDYear='$pCDYear',nmc_cd.CDPrice='$pCDPrice',nmc_cd.catID='$pCDCategory',nmc_cd.pubID='$pCDPubName' "
. "WHERE nmc_cd.CDID='$pCDID'";
i.e. You are missing a SPACE character before the WHERE Clause.
(Note the end of 2nd line)

Answer 2

Look in the MySql logs. Make sure bad queries are logged to the file and you should see the syntax error. The other thing you can do is dump out the $sql string and run that in MySQL. See if it runs successfully or not.