Question

我必须从MySQL数据库中获取一些统计数据，我需要获得订单大小范围内的订单数量，然后我需要按照订单中的created_at表格中的WEEK进行分组

我希望这是有道理的。

这是我能够提出的，但我对高级MySQL的经验很少。

SELECT 
   x.Kurv, COALESCE(ordre, 0) AS ordre
FROM (
  SELECT "0 - 100" AS Kurv
  UNION SELECT "100 - 200"
  UNION SELECT "200 - 300"
  UNION SELECT "300 - 400"
  UNION SELECT "400 - 500"
  UNION SELECT "500 - 600"
  UNION SELECT "over 600" ) x
LEFT JOIN 
  (SELECT
  CASE when base_total_ex_tax >= 0 and base_total_ex_tax <= 100 then "0 - 100"
       when base_total_ex_tax > 100 and base_total_ex_tax <= 200 then "100 - 200"
       when base_total_ex_tax > 200 and base_total_ex_tax <= 300 then "200 - 300"
       when base_total_ex_tax > 300 and base_total_ex_tax <= 400 then "300 - 400"
       when base_total_ex_tax > 400 and base_total_ex_tax <= 500 then "400 - 500"
       when base_total_ex_tax > 500 and base_total_ex_tax <= 600 then "500 - 600"
       else "over 600"
  END AS Kurv,
  COUNT(*) as ordre
FROM orders
WHERE
    created_at > '2017-01-01 00:00:00'
    && 
    status_id != 'canceled'
GROUP BY 1) 
    y ON x.Kurv = y.Kurv

哪个输出范围和订单很好，我只需要添加周组。

提前致谢。

Answer 1

您可以找到CONCAT(YEAR(date), '/', WEEK(date))的周。然后你可以分组：

SELECT  CONCAT(YEAR(date), '/', WEEK(date)) as wk
,       CASE
        WHEN amount <= 100 THEN '0 - 100'
        WHEN amount <= 200 THEN '100 - 200'
        ELSE '> 200'
        END as kurve
,       COUNT(*)
FROM    orderstable
GROUP BY
        wk
,       kurve

Example at rextester.

如果您想列出所有kurves和周，即使是没有订单的人，也可以将所有kurves（如您已经完成的）和all weeks添加到左连接的右侧。这通常更容易做客户端。

Answer 2

希望，我理解你的问题。

请查看以下查询

      SELECT 
   Y.WEEK_VAL , x.Kurv, COALESCE(ordre, 0) AS ordre
FROM (
  SELECT "0 - 100" AS Kurv
  UNION SELECT "100 - 200"
  UNION SELECT "200 - 300"
  UNION SELECT "300 - 400"
  UNION SELECT "400 - 500"
  UNION SELECT "500 - 600"
  UNION SELECT "over 600" ) x
LEFT JOIN 
  (SELECT WEEK(created_at) WEEK_VAL, 
  CASE when 5 >= 0 and 5 <= 100 then "0 - 100"
       when 5 > 100 and 5 <= 200 then "100 - 200"
       when 5 > 200 and 5 <= 300 then "200 - 300"
       when 5 > 300 and 5 <= 400 then "300 - 400"
       when 5 > 400 and 5 <= 500 then "400 - 500"
       when 5 > 500 and 5 <= 600 then "500 - 600"
       else "over 600"
  END AS Kurv,
  COUNT(*) as ordre
FROM orders GROUP BY WEEK(created_at) ,  CASE when 5 >= 0 and 5 <= 100 then "0 - 100"
       when 5 > 100 and 5 <= 200 then "100 - 200"
       when 5 > 200 and 5 <= 300 then "200 - 300"
       when 5 > 300 and 5 <= 400 then "300 - 400"
       when 5 > 400 and 5 <= 500 then "400 - 500"
       when 5 > 500 and 5 <= 600 then "500 - 600"
       else "over 600"
  END) 
    y ON x.Kurv = y.Kurv

计算价格范围内的订单，并按周编号

2 个答案: