So I'm new to php and followed some tutorials with updating records in a database. The tutorial I followed seems to work for them, but doesnt work for me and I get this error which I dont fully understand. Going to the edit page, the id in the url is correct, and it populates the input fields correctly, its just when i hit update i get the error.

The error is as follows:
Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean given in /home5/canaryde/public_html/m/reviews/edit_review.php on line 8

PHP Code:
<?php include '../includes/db_connect.php';
$query " SELECT * FROM brads_reviews WHERE ID = $_GET[id] ";
$result mysql_query($query);
$show mysql_fetch_array($result);
    <div class="container-fluid">
        <div class="row">
            <?php include '../includes/left_menu.php'?>

            <div class="col-lg-10 content-container">
                <form role="form" action="<?php echo htmlentities($_SERVER['PHP_SELF']);?>" method="post">
                  <div class="form-group" style="display: none;">
                    <input type="text" class="form-control" value="<?php echo $show['review_date']; ?>" name="review_date" >
                  <div class="form-group">
                    <label for="artist_name">Artist Name</label>
                    <input type="text" class="form-control" name="artist_name" value="<?php echo $show['artist_name']; ?>">
                  <div class="form-group">
                    <label for="release_title">Release Title</label>
                    <input type="text" class="form-control" name="release_title" value="<?php echo $show['release_title']; ?>">
                  <div class="form-group">
                      <p>Currently rated: <?php echo $show['rating']; ?></p>
                      <br />
                    <label for="rating">Change Rating&nbsp;</label>
                    <select class="combobox" name="rating">
                        <option value="zero">0</option>
                        <option value="pointfive">0.5</option>
                        <option value="one">1</option>
                        <option value="onepointfive">1.5</option>
                        <option value="two">2</option>
                        <option value="twopointfive">2.5</option>
                        <option value="three">3</option>
                        <option value="threepointfive">3.5</option>
                        <option value="four">4</option>
                        <option value="fourpointfive">4.5</option>
                        <option value="five">5</option>
                  <div class="form-group">
                    <label for="review">Review</label>
                    <textarea type="text" class="form-control" name="review" id="editor_review" style="height: 10em;"><?php echo $show['review']; ?></textarea>
                  <div class="form-group">
                      <p>Currently Approved? <?php echo $show['approved']; ?></p>
                      <br />
                      <label for="review">Change Status&nbsp;</label>
                    <select class="combobox" name="approved">
                        <option value="Yes">Yes</option>
                        <option value="No">No</option>
                        <option value="Pending">Pending</option>
                  <input type="hidden" name="id" value="<?php echo $_GET['id']; ?>" />
                  <button type="submit" class="btn btn-primary">Update</button>



    <?php include '../includes/javascript.php'?>
        CKEDITOR.replace( 'editor_review' );

if(isset($_POST['submit'])) {
$update "UPDATE brads_reviews SET `artist_name`='$_POST[artist_name]', `release_title`='$_POST[release_title]', `rating`='$_POST[rating]', `review`='$_POST[review]', `approved`='$_POST[approved]' WHERE ID = $_POST[id]";
mysql_query($update) or die(mysql_error());

header("Location: ../index.php");

Any help would be greatly appreciated.