MYSQL创建显示两个表中数据的 View

Question

我有 2 张 table

deposits 
id  |userId | amount|   Date
1   |  2    |  150  |   2013-11-22 02:57:00
2   |  3    |  230  |   2013-11-25 03:19:00

withdrawals 
id  |userId | amount|   Date
1   |  2    |  150  |   2013-11-23 02:57:00
2   |  3    |  190  |   2013-11-27 02:27:00

我想创建一个 View ，以这种格式显示两个表中的数据 记录最好按日期字段排序，但这并不重要，因为我可以按日期排序查询 View 。

depositsAndWithdrawal
type        |   id  | userId| amount    |   Date
deposit     |   1   |  2    |     150   |   2013-11-22 02:57:00
withdrawal  |   1   |  2    |     150   |   2013-11-23 02:57:00
deposit     |   2   |  3    |     230   |   2013-11-25 03:19:00
withdrawal  |   2   |  3    |     190   |   2013-11-27 02:27:00

这可能吗？或者我是否需要创建一个新表并使用插入事件向该表添加相关行？

Answer 1

您正在寻找union all查询。您可以在 MySQL View 中执行此操作:

create view v as
    select  'deposit' as which, id, userId, amount, Date
    from deposits 
    union all
    select  'withdrawals' as which, id, userId, amount, Date
    from withdrawals ;