SQL查询(如果可能,~5个表加入)?

时间:2012-06-27 20:20:00

标签: mysql sql codeigniter

我有那些MySQL表:

products
id

products_content
product_id, lang, product_name, product_content

products_and_categories
product_id, category_id

products_categories
id, parent_id

products_categories_content
category_id, lang, category_name, category_content

products_and_prices
product_id, price_id

products_prices
id

products_prices_content
price_id, lang, description, weight, price, currency

如何选择ID为5的所有产品(例如)以及每种产品的所有价格?是否可以使用单个查询?

目前要选择所有类别的产品,我正在使用(CodeIgniter):

    $this->db->select('*')
        ->from('products')
        ->join('products_content', 'products_content.product_id = products.id')
        ->join('products_and_categories', 'products_and_categories.product_id = products.id')
        ->where(array('category_id' => $category_id, 'lang' => $lang));

0 个答案:

没有答案