MySql获得的订单数量超过3个订单

Question

我有一个客户表和一个订单表我想计算有多少活跃客户已经取得了超过3个订单的表格结构是这样的：

Customer table 

customer_id, name, active 

orders table 

order_id, details, customer_id 

任何帮助？

Answer 1

试试这个：

SELECT c.customer_id, 
     c.name 
    FROM Customer AS c 
    INNER JOIN orders as o 
    ON o.customer_id = c.customer_id 
    WHERE c.active 
    GROUP BY c.customer_id, 
      c.name 
    HAVING COUNT(c.customer_id) > 3