好的-我已经改变了这个概念。在mysql数据库中，我创建了“ leave”表：
+--------+---------+---------+-------------+---------+-------------------------------+
|ID_LEAVE|ID_WORKER| FNAME | LNAME | BEGIN_DATE | END_DATE |
+--------+---------+---------+---------+------------+--------------------+-----------
| 1 | 1 | DAVID | BUCS |2019-03-19 07:00:00 |2019-03-19 15:00:00 |
+--------+---------+---------+----------------------+--------------------+-----------
| 2 | 2 | MARK | GREEN |2019-03-21 07:00:00 |2019-03-21 15:00:00 |
+--------+---------+---------+----------------------+--------------------------------+
“工人”表：
+----------+---------+---------+
|ID_WORKER | FNAME | LNAME |
+----------+---------+----------
| 1 | DAVID | BUCS |
+----------+---------+----------
| 2 | MARK | GREEN |
+----------+---------+---------+
“订单”表：
+----------+--------------+---------------+
|ID_ORDER | DESC_ORDER | NUMBER_ORDER |
+----------+--------------+---------------+
| 20 | TEST | TEST |
+----------+--------------+---------------+
“订单状态”表：
+----------+---------+---------+---------------------+-------------------+------------+
| Id_status|ID_WORKER| ID_ORDER| BEGIN_DATE | END_DATE | ORDER_DONE |
+----------+---------+---------+----------+------------+---------+--------------------+
| 30 | 1 | 20 |2019-03-18 06:50:35 |2019-03-18 15:21:32| NO |
+----------+---------+---------+------------+---------+-------------------+-----------+
| 31 | 1 | 20 |2019-03-20 06:44:12 |2019-03-20 15:11:23| NO |
+----------+---------+---------+------------+---------+-------------------+-----------+
| 32 | 1 | 20 |2019-03-22 06:50:20 |2019-03-22 12:22:33| YES |
+----------+---------+---------+------------+---------+-------------------+-----------+
| 33 | 2 | 20 |2019-03-18 06:45:11 |2019-03-18 15:14:45| NO |
+----------+---------+---------+------------+---------+-------------------+-----------+
| 34 | 2 | 20 |2019-03-20 06:50:22 |2019-03-20 15:10:32| NO |
+----------+---------+---------+------------+---------+-------------------+-----------+
| 35 | 2 | 20 |2019-03-22 06:54:11 |2019-03-22 11:23:45| YES |
+----------+---------+---------+------------+---------+-------------------+-----------+
我做了什么：
我可以总结订单上每个工作人员的“总计时间”（在order_status表中），包括总结请假表中的“离开时间”。我也已正确选择了彼此的工人订单（LNAME，FNAME）订单（DESC_ORDER和NUMBER_ORDER）和“ TOTAL TIME”。我在下面编写了mysql命令：
SELECT workers.fname,
workers.lname,
order_statusAgg.number_order,
workers.id_worker,
order_statusAgg.desc_order,
SEC_TO_TIME(SUM(order_statusAgg.stime)) AS 'TOTAL TIME',
SEC_TO_TIME(SUM(leaveAgg.ltime)) AS 'LEAVE TIME'
FROM workers
INNER JOIN (
SELECT leave.id_worker, SUM((Time_to_sec(leave.end_date) -
Time_to_sec(leave.begin_date))) AS ltime
FROM leave
GROUP BY leave.id_worker
) leaveAgg
ON leaveAgg.id_worker = workers.id_worker
INNER JOIN (
SELECT order_status.id_worker, orders.number_order, orders.desc_order, SUM((Time_to_sec(order_status.end_date) -
Time_to_sec(order_status.begin_date))) AS stime
FROM order_status
INNER JOIN orders
ON orders.id_order = order_status.id_order
GROUP BY order_status.id_worker
) order_statusAgg
ON workers.id_worker = order_statusAgg.id_worker
WHERE order_statusAgg.number_order LIKE 'TEST'
GROUP BY workers.id_worker
然后在该命令之后我得到：
+---------+---------+---------------+------------+------------+--------------+
| FNAME | LNAME | NUMBER_ORDER | DESC_ORDER | TOTAL TIME | LEAVE_TIME |
+---------+---------+---------------+------------+------------+--------------+
| DAVID | BUCS | TEST | TEST | 22:30:21 | 8:00:00 |
+---------+---------+---------------+------------+------------+--------------+
| MARK | GREEN | TEST | TEST | 21:19:18 | 8:00:00 |
+---------+---------+---------------+------------+------------+--------------+
接下来我要做什么：
接下来我要做什么：我正在尝试总结所有内容，我的意思是：每个工人的总时间+ LEAVE_TIME。例如：
+---------+---------+---------------+------------+------------+-------------+----------+
| FNAME | LNAME | NUMBER_ORDER | DESC_ORDER | TOTAL TIME | LEAVE_TIME | SUM_TIME |
+---------+---------+---------------+------------+------------+--------------+----------+
| DAVID | BUCS | TEST | TEST | 22:30:21 | 8:00:00 | 30:30:21 |
+---------+---------+---------------+------------+------------+--------------+----------+
| MARK | GREEN | TEST | TEST | 21:19:18 | 8:00:00 | 29:19:18 |
+---------+---------+---------------+------------+------------+--------------+----------+
我尝试在最上面的查询中添加到：
SEC_TO_TIME(SUM(SEC_TO_TIME(SUM(order_statusAgg.ttime) + SUM(leaveAgg.stime)) AS 'SUM_TIME';
但是我知道这是一个坏主意。所以我不知道如何解决它。有人知道如何解决吗？有任何想法吗。非常感谢您的帮助！