Question

我在mysql中有两个表order_header和order_details。第一个表order_header包含order_id，order_amount，order_date。如下所示：

    +----------+--------+------------+
    | order_id |amount  | order_date |
    +----------+--------+------------+
    |  2001    |  700   |01-02-2017  |
    |  2002    |  1200  |02-02-2017  |
    +----------+--------+------------+

第二张表order_details包含order_id，item_name，quantity，amount，order_date。如下所示：

    +----------+---------------+---------+--------+------------+
    | order_id | item_name     |quantity |amount  | order_date |
    +----------+---------------+---------+--------+------------+
    |  2001    |Chocolate Cake |    2    |  500   |01-02-2017  |
    |  2001    |Bevarages      |    4    |  200   |01-02-2017  |
    |  2002    |Strawberry Cake|    2    |  600   |02-02-2017  |
    |  2002    |Bevarages      |    12   |  600   |02-02-2017  |
    +----------+---------------+---------+--------+------------+

我的问题是当order_details在order_header表中唯一时，如何将order_id的数据填充到order_header表中。如何在order_id表中为一堆订单生成序列中的order_details？

Answer 1

以下查询可以帮助您

insert into order_header(order_id, amount, order_date)
select order_id, sum(amount), order_date
from order_details
group by order_id, order_date

在mysql中填充采购订单表

1 个答案: