MySQL-从两个表中正确获取用户及其订单数据

时间:2019-04-18 08:23:00

标签: mysql

我有具有这种结构的用户和订单表(简化了问题):

用户

用户ID

ownerid(用户所有者ID,如主要用户)

公司

订单

id

日期(下订单日期)

user_id

总计

我需要获取与一个所有者(例如ownerid,例如52个)相关的所有用户,这些所有者在选定时期内下订单,并带有一些字段的数组(请参阅查询)。不幸的是,我的请求给出一个(不是数组)而不是当前结果(有时甚至在所有字段中都为null)。这是我的要求:

SELECT
  ei_users.userid as id,
  ei_users.company as company,
  ei_users.city as city,
  ei_users.user_type as user_type,
  ei_users.registered as registered,
  count(ei_orders.id) AS orders,
  sum(ei_orders.total) AS revenue
FROM
 ei_orders,
 ei_users
WHERE
 ei_users.userid = ei_orders.user_id 
 && ei_users.ownerid = 52 
 && DATE_FORMAT(ei_orders.date, "%b") = "Apr" 
 && DATE_FORMAT(ei_orders.date, "%Y") = "2019"

请让我知道我的请求出了什么问题以及为什么我没有得到结果数组?

我发现了我的错误,我忘记在末尾添加 GROUP BY ei_users.userid

SELECT
  ei_users.userid as id,
  ei_users.company as company,
  ei_users.city as city,
  ei_users.user_type as user_type,
  ei_users.registered as registered,
  count(ei_orders.id) AS orders,
  sum(ei_orders.total) AS revenue
FROM
 ei_orders,
 ei_users
WHERE
 ei_users.userid = ei_orders.user_id 
 && ei_users.ownerid = 52 
 && DATE_FORMAT(ei_orders.date, "%b") = "Apr" 
 && DATE_FORMAT(ei_orders.date, "%Y") = "2019"
GROUP BY ei_users.userid

1 个答案:

答案 0 :(得分:0)

好像我忘了最后添加:

GROUP BY ei_users.userid