mySQL 在 WHERE 子句中引用别名（EAV 模型）答案

【问题标题】：mySQL refer to alias in WHERE clause (EAV Model)mySQL 在 WHERE 子句中引用别名（EAV 模型）
【发布时间】：2015-07-21 08:52:14
【问题描述】：

我有以下 mySQL 查询，它基本上搜索名称中包含“rawganic”的所有产品。

它看起来很乱，因为 Magento 使用的是相当混乱的实体-属性-值模型，所以我有很多选择查询来提取数据（我相信可能有更好的方法）。

SELECT entity_id As eID, value as PName, 
   (SELECT value from catalog_product_entity_varchar WHERE attribute_id = 152 and entity_id = eID) as Size, 
   (SELECT sku from catalog_product_entity WHERE entity_id = eID) as SKU,
   (SELECT type_id from catalog_product_entity WHERE entity_id = eID) as Type,
   (SELECT value from catalog_product_entity_decimal WHERE attribute_id = 75 and entity_id = eID) as RRP,
   (SELECT value from catalog_product_entity_int WHERE attribute_id = 96 and entity_id = eID) as Status 
FROM catalog_product_entity_varchar 
WHERE (attribute_id = 71 and value like '%rawganic%')

结果是：

这很好，除了现在我想添加另一个 WHERE 子句，其中类型必须为“简单”且状态为“1”。

SELECT 查询引用了一个别名“eID”，但是我不能在 WHERE 子句中使用它。如何添加这些额外的 WHERE 子句？

【问题讨论】：

标签： mysql magento entity-attribute-value

【解决方案1】：

您可以使用 HAVING：

SELECT entity_id As eID, value as PName, 
   (SELECT value from catalog_product_entity_varchar WHERE attribute_id = 152 and entity_id = eID) as Size, 
   (SELECT sku from catalog_product_entity WHERE entity_id = eID) as SKU,
   (SELECT type_id from catalog_product_entity WHERE entity_id = eID) as Type,
   (SELECT value from catalog_product_entity_decimal WHERE attribute_id = 75 and entity_id = eID) as RRP,
   (SELECT value from catalog_product_entity_int WHERE attribute_id = 96 and entity_id = eID) as Status 
FROM catalog_product_entity_varchar 
WHERE (attribute_id = 71 and value like '%rawganic%')
HAVING Type = 'Simple' AND Status = 1

【讨论】：