我有一个餐桌顾客和第二张餐桌订单。我已经从客户那里获取了,但是它获取了重复的记录。
选择customers.name,customers.mobile,orders.Product来自客户,订单其中customer.id = orders.customer_id结果:enter image description here
您需要在GROUP BY
列上将Customers
设置为Order
select c.name,
c.mobile,
group_concat(o.Product) #products name separated by a comma
from customers c
left join orders o on
c.id = o.customer_id
group by c.id