Select 个上次下订单早于 X 日期的帐户

Question

我正在尝试确定最后一次在特定日期或之前下订单的购物者。我想这样做是为了识别过时的帐户并取消订阅邮件。

到目前为止我有这个查询，但它似乎正在检索比指定日期最近订购的帐户 - 这不是我想要的！

SELECT
  s.id,s.first_name,s.last_name,s.email, latest_orders.last_order_date, au.verified, au.unh
FROM
  (SELECT
     shopper_id, MAX(order_date) AS last_order_date
   FROM
     order_list WHERE order_date <= ?
   GROUP BY
     shopper_id) AS latest_orders
INNER JOIN
  shoppers s
ON
  s.id = latest_orders.shopper_id
JOIN auth_users au ON au.shopper_id=s.id 
  WHERE s.mail_outs='Y' LIMIT 50

Answer 1

使用having:

SELECT shopper_id, MAX(order_date) AS last_order_date
FROM order_list 
GROUP BY shopper_id
HAVING MAX(order_date) <= ?;

如果您想了解有关购物者的所有信息，请返回 shoppers：

SELECT s.*, os.last_order_date
FROM shoppers s JOIN
     (SELECT shopper_id, MAX(order_date) AS last_order_date
      FROM order_list 
      GROUP BY shopper_id
      HAVING MAX(order_date) <= ?
     ) os
     ON os.shopper_id = s.id;

Select 个上次下订单早于 X 日期的帐户

Select accounts where last order placed was older than X date

mysql

sql

database

pdo