Question

I am trying to write the SQL that selects all products and available features.

My database is as follows:

CREATE TABLE IF NOT EXISTS `products` (
  `product_id` int(11) NOT NULL AUTO_INCREMENT,
  `product_name` varchar(255) NOT NULL,
  `product_description` varchar(255) NOT NULL,
  `product_weight` varchar(255) NOT NULL,
  `product_price` decimal(11,2) NOT NULL,
  `product_image` varchar(255) NOT NULL,
  PRIMARY KEY (`product_id`)
);

CREATE TABLE IF NOT EXISTS `features` (
  `feature_id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `feature_uri` varchar(255) NOT NULL,
  `feature_name` varchar(100) NOT NULL,
  `feature_title` varchar(150) DEFAULT NULL,
  `feature_body` text,
  `feature_body_short` varchar(255) DEFAULT NULL,
  `feature_image` varchar(255) DEFAULT NULL,
  `parent_id` int(11) unsigned NOT NULL,
  PRIMARY KEY (`feature_id`),
  UNIQUE KEY `feature_uri_UNIQUE` (`feature_uri`),
  KEY `parentFK` (`feature_id`),
  FULLTEXT KEY `feature_name_FT` (`feature_name`),
  FULLTEXT KEY `feature_body_FT` (`feature_body`)
);

CREATE TABLE IF NOT EXISTS `feature_products` (
  `feature_product_id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `feature_product_order` smallint(6) DEFAULT NULL,
  `feature_product_standard` tinyint(1) NOT NULL,
  `feature_id` int(11) unsigned NOT NULL,
  `product_id` int(11) unsigned NOT NULL,
  PRIMARY KEY (`feature_product_id`),
  KEY `productFK` (`product_id`),
  KEY `featureFK` (`feature_id`)
);

I would like to be able to do this in one loop e.g:

{foreach}
<tr>
    <td>{name}</td>
    <td>{weight}</td>
    <td>{if product_id == 1}yes{/if}</td>
    <td>{if product_id == 2}yes{/if}</td>
etc
<tr>
{/foreach}

I am using Zend, if this can be of use.

Trying to achieve this HTML:

UPDATE:

Non of the suggested answers are working, instead I managed to hack it to work like this:

SELECT
  p.*,
  (
    SELECT
      GROUP_CONCAT(f.feature_id SEPARATOR ', ')
    FROM feature_products fp
      LEFT JOIN features f ON f.features_id = fp.feature_id
    WHERE fp.product_id = p.product_id
    LIMIT 1
  ) as features
FROM product p

Although the problem with the above code is that it does not return ‘feature_product_standard’

Answer 1

I’m assuming that you have MySQL, dunno about Zend, but this should get you started.

SELECT 
  p.product_name
  , p.product_description
  , p.product_weight
  , p.product_price
  , p.product_image
  , GROUP_CONCAT(f.feature_id ORDER BY f.feature_id) as feature_ids
  , GROUP_CONCAT(f.feature_name ORDER BY f.feature_id) as feature_names
FROM products p
LEFT JOIN feature_products fp ON (fp.product_id = p.product_id)
LEFT JOIN features f ON (f.feature_id = fp.feature_id)
GROUP BY p.product_id