SQL分组聚合子查询问题

news2024/9/25 8:57:09

场景

订单表 t_order 有如下数据：
字段分别为，销售订单号、订货数量
在这里插入图片描述

发货表 t_order_delivery 有如下数据：
字段分别为，销售订单号、发货数量
在这里插入图片描述

问题

问题1：查询部分发货的销售订单号数据？

分析：一个订单可能分为多次发货，如果想要获取到一个订单到底发了多少货，就需要对发货单进行聚合。

聚合查询发货单的全部发货数量之和，以及订单的订货数量结果
然后再利用子查询比较二者的大小关系

先把子查询写出来

SELECT 
  ANY_VALUE (line.sales_order_id) AS sales_order_id,
  SUM(line.order_quantity) AS order_quantity,
  SUM(p.delivered_quantity) AS delivered_quantity 
FROM
  t_ph_ibmp_order_line line 
  LEFT JOIN 
    (SELECT 
      sales_order_id,
      SUM(delivered_quantity) AS delivered_quantity 
    FROM
      t_ph_ibmp_orderdelivery_position 
    GROUP BY sales_order_id) AS p 
    ON line.sales_order_id = p.sales_order_id 
GROUP BY line.sales_order_id

再写外层判断条件的查询：

SELECT 
  *
FROM

  (SELECT 
    ANY_VALUE (line.sales_order_id) AS sales_order_id,
    SUM(line.order_quantity) AS order_quantity,
    SUM(p.delivered_quantity) AS delivered_quantity 
  FROM
    t_ph_ibmp_order_line line 
    LEFT JOIN 
      (SELECT 
        sales_order_id,
        SUM(delivered_quantity) AS delivered_quantity 
      FROM
        t_ph_ibmp_orderdelivery_position 
      GROUP BY sales_order_id) AS p 
      ON line.sales_order_id = p.sales_order_id 
  GROUP BY line.sales_order_id) t 
  
WHERE t.order_quantity >= t.delivered_quantity 
  AND t.delivered_quantity >= 0

整体的思路就是：
利用子查询先分组聚合数据，之后再利用子查询处理分组聚合后的条件查询。

问题2：查询全部发货的销售订单号数据？

SELECT 
  * 
FROM
  (SELECT 
    ANY_VALUE (line.sales_order_id) AS sales_order_id,
    SUM(line.order_quantity) AS order_quantity,
    SUM(p.delivered_quantity) AS delivered_quantity 
  FROM
    t_ph_ibmp_order_line line 
    LEFT JOIN 
      (SELECT 
        sales_order_id,
        SUM(delivered_quantity) AS delivered_quantity 
      FROM
        t_ph_ibmp_orderdelivery_position 
      GROUP BY sales_order_id) AS p 
      ON line.sales_order_id = p.sales_order_id 
  GROUP BY line.sales_order_id) t 
WHERE t.order_quantity = t.delivered_quantity

问题3：查询未发货的销售订单号数据？

SELECT 
  * 
FROM
  (SELECT 
    ANY_VALUE (line.sales_order_id) AS sales_order_id,
    SUM(line.order_quantity) AS order_quantity,
    SUM(p.delivered_quantity) AS delivered_quantity 
  FROM
    t_ph_ibmp_order_line line 
    LEFT JOIN 
      (SELECT 
        sales_order_id,
        SUM(delivered_quantity) AS delivered_quantity 
      FROM
        t_ph_ibmp_orderdelivery_position 
      GROUP BY sales_order_id) AS p 
      ON line.sales_order_id = p.sales_order_id 
  GROUP BY line.sales_order_id) t 
WHERE t.delivered_quantity = 0 
  OR t.delivered_quantity IS NULL