如何在sql中计算类似的数据？

Question

我有一张表tmp。

查询：

select * from tmp

我希望以下列方式得到结果：

customer_id | subscriber_id  | totalSubscribers    
320         | 433            |     3  
320         | 434            |     3   

你能告诉我如何实现这个目标吗？

Answer 1

以下是您提问的解决方案

SELECT customer_id , subscriber_id , count(*) AS totalSubscribers 
FROM `tmp` GROUP BY 1,2

或

SELECT customer_id , subscriber_id , count(*) AS totalSubscribers 
FROM `tmp` GROUP BY customer_id , subscriber_id

这是执行查询的screnshot

Answer 2

以下是答案

  SELECT customer_id , subscriber_id , count(*) as [TOTAL]
    FROM  tmp
    GROUP BY customer_id , subscriber_id