Question

我可以从每列获取一些数据，然后使用mysql查询将其存储在一个结果列中吗？

Table
Truck Number, Depart time, Arrive time
0001,'2016-10-05 07:15:00','2016-10-05 10:10:00' 
0002,'2016-10-05 08:15:00','2016-10-05 09:30:00'
0003,'2016-10-04 19:15:00','2016-10-05 08:45:00'

我只想要从2016-10-05 08:00:00离开或到达的卡车到'2016-10-05 08:50:00'

我希望输出为

Truck, Time
0002  '2016-10-05 08:15:00'
0003  '2016-10-05 08:45:00'

如果可能的话，列也是时候来的。

Answer 1

UNION会为你工作吗？，就像这样：

select truck, departtime as time , 'Depart' as direction
where departtime between '2016-10-05 08:00:00' and '2016-10-05 08:50:00' 

UNION 

select truck, arrivetime as time , 'Arrive' as direction
where arrivetime between '2016-10-05 08:00:00' and '2016-10-05 08:50:00'

ORDER BY TRUCK, TIME

Answer 2

SELECT  T.TRUCKNUMBER,
            CASE WHEN DEPART BETWEEN '2016-10-05 08:00:00' AND '2016-10-05 08:50:00' THEN DEPART
            ELSE ARRIVE 
            END AS TIME ,
            CASE WHEN DEPART BETWEEN '2016-10-05 08:00:00' AND '2016-10-05 08:50:00' THEN 'DEPART'
            ELSE 'ARRIVE' 
            END AS SourceColumn 

FROM    T   WHERE DEPART BETWEEN '2016-10-05 08:00:00' AND '2016-10-05 08:50:00' OR
                    ARRIVE BETWEEN '2016-10-05 08:00:00' AND '2016-10-05 08:50:00'

结果

+-------------+---------------------+--------------+
| TRUCKNUMBER | TIME                | SourceColumn |
+-------------+---------------------+--------------+
|           2 | 2016-10-05 08:15:00 | DEPART       |
|           3 | 2016-10-05 08:45:00 | ARRIVE       |
+-------------+---------------------+--------------+

将两列合并为一列仅用于所需数据

2 个答案: