同时查询列和列的计算PostgreSQL

Question

我有两个表，Products和BundleProducts与BaseProducts有ooo关系。 A BundleProduct是使用与Products表格的m2m关系的Products的集合。 Products具有price列，并且BundleProduct的价格计算为其Products的价格总和。

BaseProducts有像name和description列这样我就可以查询它来获取两Products和BundleProducts。

是否可以查询和sort by price既为Products的price列和计算BundleProducts的price？

Answer 1

尝试这样：

SELECT name, description, price 
FROM (
    SELECT name, description, price FROM products 
    UNION 
    SELECT bundle_products.name, bundle_products.description, sum(products.price) 
    FROM bundle_products 
    JOIN products on (<your join condition) 
    GROUP BY bundle_products.name, bundle_products.description 
) AS combined 
ORDER BY price