php - 获取表中的相同行

Question

好的，我有这种结构的表：

order_id product_id price

18645 289 5.90

18644 219 1.80

18644 109 2.30

18643 289 4.50

18642 180 9.80

18642 190 3.40

我如何能够product_id's从order_id's每组的总价格中计算出相同的价格product_ids？

Answer 1

要获得明智的产品COUNT，SUM您需要使用聚合函数 GROUP BYproduct_id：

SELECT product_id,
       COUNT(1) AS product_count,
       SUM(price) AS total_price
FROM table_name
WHERE order_id BETWEEN 18642  AND 18645
GROUP BY product_id
ORDER BY product_count ASC, total_price ASC 

Answer 2

尝试

SELECT PRODUCT_ID,
       COUNT(product_id) totalCount,
       SUM(price) totalPrice
FROM tableName
WHERE Order_ID BETWEEN 00001  AND 99999
GROUP BY PRODUCT_ID

Answer 3

尝试这个：

您只需按 product_id 分组

select product_id,
       count(*) as count ,
       sum(price) as price
from   <table>
where  order_id beteen <val1> and <val2>
group by product_id