【发布时间】:2010-03-16 00:35:54
【问题描述】:
tbl_customer.id 是客户的 id
tbl_order.customer_id
一个查询将选择 tbl_order 中具有 4 条或更多记录的所有客户
【问题讨论】:
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Michael,我今天早上写到凌晨 1 点,然后早上 7 点起床,所以我很累,这让我更难提出问题
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大声笑,但我梦想着编码!
tbl_customer.id 是客户的 id
tbl_order.customer_id
一个查询将选择 tbl_order 中具有 4 条或更多记录的所有客户
【问题讨论】:
SELECT tbl_order.customer_id, COUNT(*)
FROM tbl_order
GROUP BY customer_id
HAVING COUNT(*) > 4
【讨论】:
select customer.id, count(*) as num_orders
from customer
inner join tbl_order ON (tbl_order.customer_id = customer.id)
group by customer.id
having num_orders >= 4;
【讨论】:
综合以上答案(谢谢)
我的结局
SELECT c.first_name,c.SURNAME,c.ADDRESS1,c.CREATED ,COUNT(*) AS num_orders
FROM tbl_customer AS c
INNER JOIN tbl_order_head AS o ON (o.customer_id = c.id)
GROUP BY c.id
HAVING num_orders >= 4 ORDER BY num_orders DESC;
【讨论】: