使用复合主键将新记录插入表中

Question

This question may be very simple but I have been struggling to find a solution. Here is what I have, table order with two composite primary key (order_id, order_detail_id). This is just for an illustration purpose but my prd table is of the same concept.

Order

order_id | order_detail_id | order_name

My question is how to insert a new record with an existing order_id. Let's say these are the rows existing,

1 | 1 | 'Order 1 Detail 1'
1 | 2 | 'Order 1 Detail 2'
2 | 1 | 'Order 2 Detail 1'

Now I want to a new order detail into the existing order 1. I use Mysql 5 with InnoDB. Any help is appreciated.

Answer 1

insert into order 
    select order_id, max(order_detail_id) + 1, 'Order 1 Detail 3' 
    where order_id=1