我们有三张桌子
1. customer
2. custumerorder
3. order_type
客户: custumer_id,custumer_name,custumer_address,custumer_phone,status
ORDER_TYPE order_type_id,订单类型,
custumerorder custumerorder_id,custumer_id,order_type_id,order_date,Total_order,shipping_info
我想查看最后的订单详情 所以我有查询
SELECT c.*,
tblcusorder.order_dt,
tblcusorder.orderType,
tblcusorder.shipping_info
FROM customer c
LEFT JOIN
( SELECT max(cr.order_date) AS order_dt,
ot.orderType,
cr.custumer_id,
cr.custumerorder_id,
cr.order_type_id,
cr.shipping_info
FROM custumerorder cr
INNER JOIN order_type ot ON ot.order_type_id=cr.order_type_id
GROUP BY cr.custumer_id ) AS tblcusorder ON tblcusorder.custumer_id=c.custumer_id
WHERE c.status='TRUE'
问题
因为我在订单日期使用Max()函数,所以它显示最后的订单日期是好的,但其余的行数据不是来自该行(客户订单),而且ordertype与该日期没有关联。