從表格中選擇「特定名稱」或「全部」

Question

現在我從表中調用taman section，我只想調用特定的taman節或調用表中的所有taman section，我怎麼能這樣做？ 貝婁是我的代碼：
post.php中：

<select name="taman"> 
<option value="taman1">Taman1</option> 
<option value="tamanA">TamanA</option> 
<option value="*">ALL</option> 
</select> 

select.php

$taman = $_POST["taman"]; //this taman are post from post.php,I have tried put value * to this $taman, but still cannot. 

$qry="SELECT cusinfo.* FROM cusinfo 
         WHERE cusinfo.TAMAN_SECTION = '$taman' 
         ";