我有三个mySQL表:
客户
产品
采购
我想让三个拥有ID = 1的产品最大购买量的客户:
client:-
client_id | name
1 | client1
2 | client2
3 | client3
4 | client4
product:-
prod_id | name
1 | product1
采购:
purchase_id | client_id | product_id
1 | 1 |1
2 | 1 |1
3 | 1 |1
4 | 1 |1
5 | 2 |1
7 | 2 |1
8 | 2 |1
9 | 3 |1
10 | 3 |1
11 | 4 |1
=>我想得到以下结果:
-client1
-client2
-client3
我能怎么做?
最佳答案
SELECT client.name
FROM client
JOIN purchase ON purchase.client_id = client.client_id
JOIN product ON purchase.product_id = product.product_id and product.product_id = 1
GROUP BY client.client_id
ORDER BY COUNT(purchase.purchase_id) DESC
LIMIT 3
关于mysql - MySQL,获得购买量最大的三个客户:,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/24861363/