Question

请原谅我，如果我的错误，仍然试图学习高级mySql查询。我试图从电子商务平台导出数据，我需要的一些数据是在查找表中，问题是我拥有的一个查找表可以有多个关联的值，而我需要将数据输入到系统中需要该列的特定格式。

如果有帮助，我使用zen cart作为我的来源，以下是查询。

Select zp.products_id as id, zpd.products_name as name, products_price_w as cost, products_price as price, zp.products_date_added as date_created, zp.products_image as thumbnail
FROM `zen_products` as zp
LEFT JOIN `zen_products_description` as zpd ON zp.products_id = zpd.products_id
WHERE zp.products_status = 1
ORDER BY zp.products_id ASC;

我需要的是一个查找表，告诉我哪些类别属于每个产品，我知道它将成为另一个连接，但我需要它，所以如果超过1个类别属于产品将其放入相同的列，并用@符号连接它们，它不是类别的id，它的路径，所以我需要查找类别ID到另一个表来获取路径。

所以“category1 / subcategory @ category2”例如..

感谢任何指导。

编辑：我仍然需要合并结果，因为我得到了我想要的结果的两倍，但我看到了每个类别的记录...

Select zp.products_id as id, zpd.products_name as name, zcd.categories_name as categories, products_price_w as cost, products_price as price, zp.products_date_added as date_created, zp.products_image as thumbnail
FROM `zen_products` as zp
INNER JOIN `zen_products_description` as zpd ON zp.products_id = zpd.products_id
INNER JOIN `zen_products_to_categories`as zptc ON zp.products_id = zptc.products_id
INNER JOIN `zen_categories_description` as zcd on zptc.categories_id = zcd.categories_id
WHERE zp.products_status = 1
ORDER BY zp.products_id ASC;

Answer 1

您要找的是group_concat()。我认为会是这样的：

Select zp.products_id as id, zpd.products_name as name,
       group_concat(zcd.categories_name separator '@') as categories,
       products_price_w as cost, products_price as price,
       zp.products_date_added as date_created, zp.products_image as thumbnail
FROM `zen_products` as zp
INNER JOIN `zen_products_description` as zpd ON zp.products_id = zpd.products_id
INNER JOIN `zen_products_to_categories`as zptc ON zp.products_id = zptc.products_id
INNER JOIN `zen_categories_description` as zcd on zptc.categories_id = zcd.categories_id
WHERE zp.products_status = 1
group by zp.products_id
ORDER BY zp.products_id ASC;

自定义格式mysql查询和一列中的多个值

1 个答案: