插入MySQL的列记录到第二个表具有不同的列名

Question

我有一个表称为

为了

| id | created | customer_id | ... | ... | 

我想与记录移动创建的列和CUSTOMER_ID等第二表称为

order_meta

| id | order_id | meta | value | 

使元是“创造”和值从订单的表

创造价值这是可以做到用MySQL查询或者我需要为此创造一个脚本？

Answer 1

这是你想要的吗？

insert into order_meta (order_id, meta, value) 
    insert id, 'created', created 
    from orders; 

如果你想要更多的非规范化列，你可以这样做：

insert into order_meta (order_id, meta, value) 
    insert id, m.meta, 
      (case meta when 'created' then created 
         when 'customer_id' then customer_id 
      end) 
    from orders o cross join 
     (select 'created' as meta union all 
      select 'customer_id' as meta 
     ) m 

Answer 2

INSERT INTO order_meta (order_id, meta, value) 

SELECT id, 'created', created 

FROM order