MYSQL - 连接两个表后按日期时间求和行

Question

感谢您查看我的问题。

我正在尝试通过 mysql 对小计列和按日期时间分组进行求和。我必须在求和之前连接两个表。

我的第一个表“付款”包含以下数据:

ID | User_ID | Order_ID | Subtotal | Tax | Tip | Discount | Total | Payment_Method | Payment_Collected
12 | 123     |    76    | 10.99    | 0.99|  1  | 0.00     | 12.98 | Cash           |    1

我的第二个表“订单”包含以下数据:

ID | User_ID | Address_ID |    orderplaced_ts    | order_status
76 |   23    |     123    | 2015-02-26 12:23:41  | 

我尝试运行的查询如下:

select `order`.orderplaced_ts, SUM(`payments`.subtotal) as Subtotal
from `payments`
join `order` on `order`.id=`payments`.order_id
where `order`.order_status != "Cancelled"
and `payments`.payment_collected = 1
group by `order`.orderplaced_ts

我想要实现的是获取所有小计的所有总和并按相同的日期时间分组。示例输出为:

orderplaced_ts   |  Subtotal
 2015-02-20      |   123.12
 2015-02-21      |   223.12
 2015-02-22      |   124.25
 2015-02-23      |   247.23
 2015-02-24      |   623.50

我当前的查询输出是:

 orderplaced_ts       |  Subtotal
 2015-02-20 05:56:23  |   123.12
 2015-02-20 06:36:23  |   123.12
 2015-02-20 06:38:23  |   123.12

有人可以指出我的查询为什么没有给我所需的输出的正确方向吗？

Answer 1

您需要使用格式化日期来消除时间。我认为这会做你想要的(未经测试):

select date_format(`order`.orderplaced_ts,"%Y-%m-%d"), SUM(`payments`.subtotal) as Subtotal
from `payments`
join `order` on `order`.id=`payments`.order_id
where `order`.order_status != "Cancelled"
and `payments`.payment_collected = 1
group by date_format(`order`.orderplaced_ts,"%Y-%m-%d")