0

是否可以用INNER JOINs 编写此查询？

SELECT links.product_id AS entity_id, products.sku, links.`linked_product_id` AS     linked_entity_id, products2.`sku` AS linked_skus
FROM catalog_product_entity AS products,
    catalog_product_link AS links,
    catalog_product_entity AS products2
WHERE links.`product_id` = products.`entity_id`
    AND links.`linked_product_id` = products2.`entity_id`

另外，catalog_product_link有一个 column type_id，我想只获得最后带有条件的type_id值的行，但它不起作用。我该如何去只获取记录？1AND catalog_product_link.type_id = 1type_id=1

我遇到了一个问题，当我添加WHERE links.type_id=1到语句中时，结果是错误的。下面的所有product_id内容都是相同的数字（相同的 entity_id/product_id），并且下面的所有内容sku都是 NULL。linked_product_id并且linked_skus是正确的。

更多信息：

catalog_product_entity

| entity_id | sku | ... |
-------------------
|    1      | abc |     |
|    2      | qwe |     |
|    3      | yui |     |

catalog_product_link

| product_id (same as entity_id) | linked_product_id | type_id |
----------------------------------------------------------------
|               1                |         5         |    1    |
|               1                |         6         |    1    |
|               2                |         1         |    2    |
|               3                |         1         |    1    |
|               3                |         2         |    1    |
|               3                |         4         |    1    |
4

2 回答 2

1

就像是...

SELECT
    p.sku,
    l.product_id AS entity_id, l.linked_product_id AS linked_entity_id
FROM catalog_product_entity AS p
     INNER JOIN catalog_product_link AS l
         ON p.entity_id= l.product_id
WHERE l.type_id = 1
于 2013-04-15T21:08:57.110 回答
0 
SELECT 
   links.product_id AS entity_id, 
   products.sku, 
   links.linked_product_id AS linked_entity_id, 
   products2.sku AS linked_skus
FROM catalog_product_link AS links
INNER JOIN 
  catalog_product_entity AS products ON products.entity_id = links.product_id
INNER JOIN 
  catalog_product_entity AS products2 ON products2.entity_id = links.linked_product_id
WHERE links.type_id = 1
于 2013-04-16T16:03:32.203 回答