Question

首先,试图做到的是:

查阅<代码>etp_product.price和option_price。

SELECT 
  etp_product.product_id,
  etp_product.price,
  (SELECT MIN(price) AS FIELD_2 FROM etp_product_option_value pov WHERE pov.product_id = etp_product.product_id) AS option_price
FROM
  etp_product
GROUP BY
  etp_product.product_id,
  etp_product.price

我试图这样做:

SELECT 
  etp_product.product_id,
  etp_product.price,
  (SELECT MIN(price) AS FIELD_2 FROM etp_product_option_value pov WHERE pov.product_id = etp_product.product_id) AS option_price,
SUM(etp_product.price + option_price) AS Total
FROM
  etp_product
GROUP BY
  etp_product.product_id,
  etp_product.price

但得出这一错误:

未知列栏外地清单价格

如何做到这一点?

Answer 1

SELECT 
etp_product.product_id,
  etp_product.price,
  (SELECT MIN(price) AS FIELD_2 FROM etp_product_option_value pov WHERE pov.product_id = etp_product.product_id) AS option_price,
 etp_product.price + (SELECT MIN(price) AS FIELD_3 FROM etp_product_option_value pov WHERE pov.product_id = etp_product.product_id) AS Total
FROM
  etp_product
GROUP BY
  etp_product.product_id,
  etp_product.price

Answer 2

SELECT 
  p.product_id,
  p.price,
  IFNULL(MIN(pv.price), 0) as option_price,
  (p.price + IFNULL(MIN(pv.price), 0)) as total
FROM etp_product p
JOIN etp_product_option_value pv ON WHERE pv.product_id = p.product_id
GROUP BY
  p.product_id,
  p.price

友情链接