Sql 基于相同的行值查找值

我有一个数据库，其中有一个表（

tblPersonnel

），其中填充了以下数据

Name_Personnel      VesselName  SailoutDate Time_transfer   Direction
JB                  Flight 2    3/03/2016   10:38:00        UP
MH                  Flight 2    3/03/2016   10:38:00        UP
RS                  Flight 2    3/03/2016   10:38:00        UP
JB                  Flight 2    3/03/2016   11:40:00        DOWN
MH                  Flight 2    3/03/2016   11:40:00        DOWN
RS                  Flight 2    3/03/2016   11:40:00        DOWN

我需要查询所有人员在“上升”和“下降”时间之间的总时间。 我想要这样的输出

Name_Personnel      VesselName  SailoutDate Time_transfer_UP Time_transfer_DOWN  Total_time
JB                  Flight 2    3/03/2016   10:38:00         11:40:00            01:02
MH                  Flight 2    3/03/2016   10:14:00         11:49:00            01:35
RS                  Flight 2    3/03/2016   10:36:00         11:53:00            01:17

Name\u人员

、

vesselname

和

sailoutdate

始终具有“向上”和“向下”值。所以这些可以用来搜索匹配的行

---

我如何才能做到这一点？

您可以使用条件聚合。挑战在于总时间。如果你能忍受总分钟数，那就很容易了：

select Name_Personnel, VesselName, SailoutDate,
       max(iif(direction = 'UP', time_transfer, NULL)) as time_transfer_up,
       max(iif(direction = 'DOWN', time_transfer, NULL)) as time_transfer_down,
       datediff("minute",
                 max(iif(direction = 'UP', time_transfer, NULL)) 
                 max(iif(direction = 'DOWN', time_transfer, NULL))
               ) as minutes_diff
from tblPersonnel
group by Name_Personnel, VesselName, SailoutDate;

谢谢， 两个答案都很好，尽管我看到了不同的输出，因为并不是所有的数据都完全正确填写

我最后的疑问是这样的

SELECT DateDiff("n",Max(IIf([direction]='UP',[time_transfer],Null)),Max(IIf([direction]='DOWN',[time_transfer],Null))) AS minutes_diff, tblPersons.Name_Personnel, tblPersons.VesselName, tblPersons.SailoutDate, tblPersons.Type, tblPersons.VesselName, Max(IIf([direction]='up',[time_transfer],Null)) AS Time_transfer_UP, Max(IIf([direction]='Down',[time_transfer],Null)) AS Time_tranfer_DOWN
FROM tblPersons, QRY_Numberofsailingdays
GROUP BY tblPersons.Name_Personnel, tblPersons.SailoutDate, tblPersons.Type, tblPersons.VesselName, tblPersons.VesselName
HAVING (((tblPersons.SailoutDate) Between [Forms]![FRM_Working_Time_Personnel]![TXT_startdate] And [Forms]![FRM_Working_Time_Personnel]![TXT_enddate]));

---

你试过什么吗？你被困在哪里？