MYSQL過濾器產品通過屬性

Question

如何選擇具有由用戶指定的所有屬性的產品

例如：指定用戶屬性來搜索產品：41,2,4,6

MYSQL結構是：

表：報價

`id` int(11) NOT NULL auto_increment, 

`title_pl` varchar(100) character set utf8 collate utf8_polish_ci NOT NULL, 

表：offer_att

`id` int(11) NOT NULL auto_increment, 
`offer_id` int(11) NOT NULL, 
`att_id` int(11) NOT NULL, 

表ATT

`id` int(11) NOT NULL auto_increment, 

`title_pl` varchar(255) character set utf8 collate utf8_polish_ci NOT NULL, 

Answer 1

這是你需要什麼？

SELECT * 
FROM offer 
WHERE id IN 
    (SELECT offer_id 
    FROM offer_att oa, 
      att a 
    WHERE a.title_pl IN (41, 
          2, 
          4, 
          6) 
     AND a.id = oa.att_id); 

P.S. Here是一個示例小提琴。

Answer 2

如果你想獲取僅具有所有4個屬性（41,2,4,6）報價在一起，然後如果你想獲取該至少有一個報價，你應該使用一個查詢

SELECT 
    o.id 
    o.title_pl 
FROM 
    offer o INNER JOIN offer_att oa ON o.id = oa.offer_id AND oa.att_id IN (41,2,4,6) 
GROUP BY o.id 
HAVING COUNT(DISTINCT oa.att_id) = 4 

的屬性（41或2或4或6）用這一個：

SELECT 
    o.id 
    o.title_pl 
FROM 
    offer o INNER JOIN offer_att oa ON o.id = oa.offer_id AND oa.att_id IN (41,2,4,6) 

PHP代碼來生成對您的SQL查詢參數：

<?php 
$attributes = array(41, 2, 4, 6); 
$count = count($attributes); 
$list = implode(',', $attributes); 
$query = ' 
    SELECT 
     o.id 
     o.title_pl 
    FROM 
     offer o INNER JOIN offer_att oa ON o.id = oa.offer_id AND oa.att_id IN (' . $list . ') 
'; 
$db->query($query); 
?>