';
$sql = "SELECT b.BuchID, b.Titel, b.Bild,
GROUP_CONCAT(DISTINCT CONCAT(a.VorName, ' ', a.NachName)
SEPARATOR ', ') AS 'Autor',
IF(b.Anzahl!=0, 'Verfügbar', CONCAT('Verfügbar ab: ',
(SELECT DATE_FORMAT(DATE_ADD(ab.Enddatum, INTERVAL 1 DAY)
,'%d.%m.%Y') FROM `ausgeliehenes_buch` AS ab
WHERE ab.BuchID = b.BuchID
ORDER BY ab.Reserviert ASC, ab.Enddatum ASC LIMIT 1)))
AS 'Verfügbarkeit' FROM `buch` AS b
INNER JOIN `buch_verfasst_von_autor` AS bvva
ON b.BuchID = bvva.BuchID
INNER JOIN `autor` AS a ON bvva.AutorNr = a.AutorNr
INNER JOIN `buch_hat_kategorie` AS bhk ON bhk.BuchID = b.BuchID
INNER JOIN `kategorie` AS k ON k.KategorieID = bhk.KategorieID
INNER JOIN `sprache` AS sp ON sp.SprachenID = b.SprachenID
INNER JOIN `buch_hat_stichwort` AS bhs ON bhs.BuchID = b.BuchID
INNER JOIN `stichwort` AS st ON st.StichwortID = bhs.StichwortID
GROUP BY b.BuchID
;";
$servername = "localhost";
$username = "web_b-3";
$password = "een7Ao6s";
$dbname = "bibliothek_candle";
$connection = mysqli_connect($servername, $username, $password, $dbname);
if (!$connection) {
die("Verbindung fehlgeschlagen: " . mysqli_connect_error());
}
$result = mysqli_query($connection, $sql);
$counter = 0;
if (mysqli_num_rows($result) > 0) {
while($row = mysqli_fetch_assoc($result)) {
$bookID = $row['BuchID'];
$bookCover = $row['Bild'];
$bookTitle = $row['Titel'];
$bookAuthor = $row['Autor'];
$bookAvailability = $row['Verfügbarkeit'];
if ($counter != 0) {
echo "
";
}
// TODO: OnClick auslagern.
echo "
";
$counter++;
}
} else {
echo "Keine Ergebnisse.";
}
if (!$result) {
die("Ungültige SQL-Abfrage: " . mysqli_connect_error());
}
mysqli_close($connection);
}else if($zeile['COUNT(*)'] > 0){
header("Location: passwort_stimmt_nicht.php");
}else{
header("Location: benutzer_existiert_nicht.php");
}
}else{
header("Location: 404.html");
}
?>
