<?php
if(isset($_POST['ok'])){
mysql_query("INSERT INTO `table` SET `stolb`='".$_POST['uyazwimost']."'");
}
<form action="" method="POST">
<textarea name="uyazwimost></textarea>
<input type="submit" name="ok" value="ломаем">
</form>
?>
if(isset($_GET['id'])){
mysql_query("SELECT * FROM `table` WHERE `id`='".$_GET['id']."'");
}