查询一个列和一个计算，列在相同的时间PostgreSQL

Question

我有两个表， Products 和 BundleProducts 有o2o关系BaseProducts.一个 BundleProduct 是的集合 Products 使用m2m关系 Products 表。Products 有一个 price 柱和价格的 BundleProduct 是总数来计算的价格 Products.

BaseProducts 有列像 name 和 description 所以我可以查询这得到两个 Products 和 BundleProducts.

是否有可能查询和 sort by price 两对 price 列 Products 和计算 price 的 BundleProducts?

Answer 1

试试这样的事情：

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