<?php $sql = "SELECT * FROM `liste` WHERE `beschreibung` LIKE '%" . $_POST["suche"] . "%'"; ?>
<?php $sql = "SELECT * FROM `liste` WHERE `beschreibung` LIKE '%" . $_POST["suche"] . "%' AND `spalte2` LIKE '%" . $_POST["suche"] . "%'"; ?>
<?php $sql = "SELECT * FROM `liste` WHERE `beschreibung` LIKE '%" . $_POST["suche"] . "%' OR `spalte2` LIKE '%" . $_POST["suche"] . "%'"; ?>