Question

我有这个SQL查询：

SELECT `main_table`.* FROM `ves_brand` AS `main_table`
INNER JOIN 
    (SELECT DISTINCT value from catalog_product_entity_int 
    where row_id in 
        (select row_id from catalog_product_entity_int 
        WHERE (attribute_id, value) IN ( (99, 4) ))) AS `t` 
ON main_table.brand_id = t.value 
INNER JOIN `catalog_product_entity` AS `cpeiz` 
ON cpeiz.row_id = catalog_product_entity_int.row_id 
WHERE (cpeiz.attribute_set_id != 19)

这给出了错误： #1054 - Unknown column 'catalog_product_entity_int.row_id' in 'on clause'

即使我为列catalog_product_entity_int.row_id设置了别名，该列也总是＆＃34;未知＆＃34;。

Answer 1

在您的子查询中定义了

catalog_product_entity_int，您无法直接从子查询外部引用它。（想象它就像一个局部变量，你必须以某种方式将它传回主查询）

非常依赖于您的数据集，但这样的事情将起作用

SELECT `main_table`.* FROM `ves_brand` AS `main_table`
INNER JOIN 
    (SELECT DISTINCT value, row_id from catalog_product_entity_int 
    where row_id in 
        (select row_id from catalog_product_entity_int 
        WHERE (attribute_id, value) IN ( (99, 4) ))) AS `t` 
ON main_table.brand_id = t.value 
INNER JOIN `catalog_product_entity` AS `cpeiz` 
ON cpeiz.row_id = t.row_id 
WHERE (cpeiz.attribute_set_id != 19)

两个连接语句给出了Unknown列

1 个答案: