我有以下查询:
SELECT cb.customers_id, cb.products_id, p.products_model, pd.products_name, cb.customers_basket_quantity, p.products_price, (p.products_price * cb.customers_basket_quantity) AS product_total
FROM customers_basket cb, products p, products_description pd
WHERE cb.customers_id =194075
AND cb.products_id = pd.products_id
AND p.products_id = pd.products_id
我试图弄清楚是否可以获得“cart_total”而无需执行其他查询,或使用 PHP 来保持运行总计。
我不确定是否可以使用 CASE 语句来做某事。
建议?
最佳答案
SELECT cb.customers_id, cb.products_id, p.products_model, pd.products_name, cb.customers_basket_quantity, p.products_price, (p.products_price * cb.customers_basket_quantity) AS product_total,
(SELECT sum(p.products_price * cb.customers_basket_quantity)
FROM customers_basket cb, products p
WHERE cb.customers_id =194075
AND cb.products_id = p.products_id
group by cb.customers_id) AS cart_total
FROM customers_basket cb, products p, products_description pd
WHERE cb.customers_id =194075
AND cb.products_id = pd.products_id
AND p.products_id = pd.products_id
指向 Fiddle 的链接
关于php - 如何汇总查询中的结果,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/18837462/