我几乎是Oracle的新手，它只用了3个月左右我猜我现在有点问题了。我正在运行一个查询，它将显示机器的停机时间。它将显示开始/结束时间及其差异。机械加工分两个班次，班次A是早上6:00到下午6:00，班次B是下午6:00到6:00。以下是我的查询结果示例：
Shift StartDateTime EndDateTime DifferenceInMinutes
B 09/25/2012 17:38:40 09/25/2012 19:12:26 93.7667
B 09/25/2012 19:12:26 09/25/2012 19:25:03 12.6167
B 09/25/2012 19:25:03 09/26/2012 05:55:08 630.0833
A 09/26/2012 05:55:08 09/26/2012 09:19:55 24.8
DifferenceInMinutes中的总数应该始终为每班720。我所做的是，在每个班次开始时，对于班次A，它将是上午6:00，班次班次是18:00。我使用Case何时能够做到这一点。下面是结果集的另一个例子：
Shift StartDateTime EndDateTime DifferenceInMinutes
B 09/25/2012 18:00:00 09/25/2012 19:12:26 72.43333
B 09/25/2012 19:12:26 09/25/2012 19:25:03 12.6167
B 09/25/2012 19:25:03 09/26/2012 05:55:08 630.0833
A 09/26/2012 06:00:00 09/26/2012 09:19:55 199.9167
现在我唯一的问题是EndDateTime，班次的最后一项应始终在转移A的18:00和转移B的6:00结束。我想实现如下所示：
Shift StartDateTime EndDateTime DifferenceInMinutes
B 09/25/2012 18:00:00 09/25/2012 19:12:26 72.43333
B 09/25/2012 19:12:26 09/25/2012 19:25:03 12.6167
B 09/25/2012 19:25:03 09/26/2012 06:00:00 634.95
A 09/26/2012 06:00:00 09/26/2012 09:19:55 199.9167
我必须承认我不知道如何使用Case就像我在StartDateTime上做的那样，所以我真的希望有一种方法可以解决这个问题。多谢你们。我希望我在这里有道理。这是我到目前为止所拥有的：
SQL >SELECT
> DISTINCT Hm.Txndate
, hm.shiftname AS Shift
, rd.resourcename AS TesterID
, case
when Rsh.Oldlaststatuschangedate < to_char(Rsh.Oldlaststatuschangedate, 'MM/DD/YYYY') || ' 06:00:00' and Rsh.Laststatuschangedate > to_char(Rsh.Laststatuschangedate, 'MM/DD/YYYY') || ' 06:00:00' then to_char(Rsh.Oldlaststatuschangedate, 'MM/DD/YYYY') || ' 06:00:00'
when Rsh.Oldlaststatuschangedate < to_char(Rsh.Oldlaststatuschangedate, 'MM/DD/YYYY') || ' 18:00:00' and Rsh.Laststatuschangedate > to_char(Rsh.Laststatuschangedate, 'MM/DD/YYYY') || ' 18:00:00' then to_char(Rsh.Oldlaststatuschangedate, 'MM/DD/YYYY') || ' 18:00:00'
else to_char(Rsh.Oldlaststatuschangedate)
end as StartDateTime
, lead(hm.shiftname, 1, 0) over (partition by hm.txndate order by rd.resourcename, c.containername, hm.txndate, hm.shiftname) as NextShift
, to_char(Rsh.Laststatuschangedate, 'MM/DD/YYYY') || ' ' || to_char(Rsh.Laststatuschangedate, 'HH24:MI:SS') as EndDateTime
, ROUND((((TO_DATE(rsh.laststatuschangedate, 'MM/DD/YYYY HH24:MI:SS') - TO_DATE(case
when Rsh.Oldlaststatuschangedate < to_char(Rsh.Oldlaststatuschangedate, 'MM/DD/YYYY') || ' 06:00:00' and Rsh.Laststatuschangedate > to_char(Rsh.Laststatuschangedate, 'MM/DD/YYYY') || ' 06:00:00' then to_char(Rsh.Oldlaststatuschangedate, 'MM/DD/YYYY') || ' 06:00:00'
when Rsh.Oldlaststatuschangedate < to_char(Rsh.Oldlaststatuschangedate, 'MM/DD/YYYY') || ' 18:00:00' and Rsh.Laststatuschangedate > to_char(Rsh.Laststatuschangedate, 'MM/DD/YYYY') || ' 18:00:00' then to_char(Rsh.Oldlaststatuschangedate, 'MM/DD/YYYY') || ' 18:00:00'
else to_char(Rsh.Oldlaststatuschangedate)
end)) * 24) * 60), 4) AS TotalMinutes
, Rsh.Newstatusname AS Status
, Rsh.Newreasonname AS StatusReason
, c.containername AS Lot
, pb.productname AS ProductName
, aep.paramvalue AS HandlerID
, rd.attr_09 AS HandlerType
, (SELECT e.employeename AS OperatorID FROM employee e WHERE e.employeeid = hm.employeeid) AS OperatorID
, (SELECT e.fullname AS EmployeeName FROM employee e WHERE e.employeeid = hm.employeeid) AS EmployeeName
, hm.comments AS Remarks
FROM Historymainline hm
INNER JOIN Resourcestatushistory rsh ON hm.Historymainlineid = rsh.Historymainlineid
INNER JOIN ResourceDef rd ON rd.resourceid = rsh.historyid
INNER JOIN a_equipmentparams aep ON rd.resourceid = aep.resourceid
INNER JOIN a_paramname apn ON aep.paramnameid = apn.paramnameid AND apn.paramnamename ='HANDLERID'
INNER JOIN A_WIPEquipment awe ON rd.resourceid = awe.equipmentid
INNER JOIN container c ON c.ContainerId = awe.ContainerId
INNER JOIN Product p ON c.productid = p.productid
INNER JOIN productbase pb ON p.productbaseid = pb.productbaseid
WHERE rd.Resourcename = :equipID
ORDER BY c.containername, hm.txndate;
答案 0 :(得分：2)
我觉得你在问这样的事情？
SQL> select shift, startdatetime, enddatetime, round((enddatetime - startdatetime) * 24 * 60, 4) differenceinminutes
2 from shifts
3 order by 2;
S STARTDATETIME ENDDATETIME DIFFERENCEINMINUTES
- ------------------- ------------------- -------------------
B 09/25/2012 17:38:40 09/25/2012 19:12:26 93.7667
B 09/25/2012 19:12:26 09/25/2012 19:25:03 12.6167
B 09/25/2012 19:25:03 09/26/2012 05:55:08 630.0833
A 09/26/2012 05:55:08 09/26/2012 09:19:55 204.7833
A 09/26/2012 09:19:55 09/26/2012 18:19:55 540
B 09/26/2012 18:19:55 09/26/2012 22:10:26 230.5167
B 09/26/2012 22:10:26 09/27/2012 01:11:00 180.5667
B 09/27/2012 01:11:00 09/27/2012 05:54:08 283.1333
8 rows selected.
SQL>
到
SQL> select shift, startdatetime, enddatetime,
2 round((enddatetime - startdatetime) * 24 * 60, 4) differenceinminutes
3 from (select shift,
4 case
5 when shift = 'A' and r = 'a' then
6 trunc(startdatetime) + (6 / 24)
7 when shift = 'B' and r = 'a' then
8 trunc(startdatetime) + (18 / 24)
9 else
10 startdatetime
11 end startdatetime,
12 case
13 when shift = 'A' and r = 'b' then
14 trunc(enddatetime) + (18 / 24)
15 when shift = 'B' and r = 'b' then
16 trunc(enddatetime) + (6 / 24)
17 else
18 enddatetime
19 end enddatetime
20 from (select shift, startdatetime, enddatetime,
21 case
22 when lag(shift) over(order by startdatetime) != shift then
23 'a'
24 when nvl(lead(shift) over(order by startdatetime), 'x') != shift then
25 'b'
26 when row_number() over(order by startdatetime) = 1 then
27 'a'
28 end r
29 from shifts))
30 order by startdatetime
31 /
S STARTDATETIME ENDDATETIME DIFFERENCEINMINUTES
- ------------------- ------------------- -------------------
B 09/25/2012 18:00:00 09/25/2012 19:12:26 72.4333
B 09/25/2012 19:12:26 09/25/2012 19:25:03 12.6167
B 09/25/2012 19:25:03 09/26/2012 06:00:00 634.95
A 09/26/2012 06:00:00 09/26/2012 09:19:55 199.9167
A 09/26/2012 09:19:55 09/26/2012 18:00:00 520.0833
B 09/26/2012 18:00:00 09/26/2012 22:10:26 250.4333
B 09/26/2012 22:10:26 09/27/2012 01:11:00 180.5667
B 09/27/2012 01:11:00 09/27/2012 06:00:00 289
8 rows selected.
答案 1 :(得分：1)
能够回答我自己的问题。这是我使用过的查询：
SELECT
DISTINCT Hm.Txndate
, hm.shiftname AS Shift
, rd.resourcename AS TesterID
, case
when Rsh.Oldlaststatuschangedate < to_char(Rsh.Oldlaststatuschangedate, 'MM/DD/YYYY') || ' 06:00:00' and Rsh.Laststatuschangedate > to_char(Rsh.Laststatuschangedate, 'MM/DD/YYYY') || ' 06:00:00' then to_char(Rsh.Oldlaststatuschangedate, 'MM/DD/YYYY') || ' 06:00:00'
when Rsh.Oldlaststatuschangedate < to_char(Rsh.Oldlaststatuschangedate, 'MM/DD/YYYY') || ' 18:00:00' and Rsh.Laststatuschangedate > to_char(Rsh.Laststatuschangedate, 'MM/DD/YYYY') || ' 18:00:00' then to_char(Rsh.Oldlaststatuschangedate, 'MM/DD/YYYY') || ' 18:00:00'
else to_char(Rsh.Oldlaststatuschangedate)
end as StartDateTime
, case
when lead(hm.shiftname, 2, 0) over (order by c.containername, hm.txndate) <> hm.shiftname then
case
when lead(hm.shiftname, 2, 0) over (order by c.containername, hm.txndate) = 'A' then to_char(Rsh.Laststatuschangedate, 'MM/DD/YYYY') || ' 06:00:00'
when lead(hm.shiftname, 2, 0) over (order by c.containername, hm.txndate) = 'B' then to_char(Rsh.Laststatuschangedate, 'MM/DD/YYYY') || ' 18:00:00'
end
else to_char(Rsh.Laststatuschangedate)
end as EndDateTime
, ROUND((((TO_DATE(case
when lead(hm.shiftname, 2, 0) over (order by c.containername, hm.txndate) <> hm.shiftname then
case
when lead(hm.shiftname, 2, 0) over (order by c.containername, hm.txndate) = 'A' then to_char(Rsh.Laststatuschangedate, 'MM/DD/YYYY') || ' 06:00:00'
when lead(hm.shiftname, 2, 0) over (order by c.containername, hm.txndate) = 'B' then to_char(Rsh.Laststatuschangedate, 'MM/DD/YYYY') || ' 18:00:00'
end
else to_char(Rsh.Laststatuschangedate)
end) - TO_DATE(case
when Rsh.Oldlaststatuschangedate < to_char(Rsh.Oldlaststatuschangedate, 'MM/DD/YYYY') || ' 06:00:00' and Rsh.Laststatuschangedate > to_char(Rsh.Laststatuschangedate, 'MM/DD/YYYY') || ' 06:00:00' then to_char(Rsh.Oldlaststatuschangedate, 'MM/DD/YYYY') || ' 06:00:00'
when Rsh.Oldlaststatuschangedate < to_char(Rsh.Oldlaststatuschangedate, 'MM/DD/YYYY') || ' 18:00:00' and Rsh.Laststatuschangedate > to_char(Rsh.Laststatuschangedate, 'MM/DD/YYYY') || ' 18:00:00' then to_char(Rsh.Oldlaststatuschangedate, 'MM/DD/YYYY') || ' 18:00:00'
else to_char(Rsh.Oldlaststatuschangedate)
end)) * 24) * 60), 4) AS TotalMinutes
, Rsh.Newstatusname AS Status
, Rsh.Newreasonname AS StatusReason
, c.containername AS Lot
, pb.productname AS ProductName
, aep.paramvalue AS HandlerID
, rd.attr_09 AS HandlerType
, (SELECT e.employeename AS OperatorID FROM employee e WHERE e.employeeid = hm.employeeid) AS OperatorID
, (SELECT e.fullname AS EmployeeName FROM employee e WHERE e.employeeid = hm.employeeid) AS EmployeeName
, hm.comments AS Remarks
FROM Historymainline hm
INNER JOIN Resourcestatushistory rsh ON hm.Historymainlineid = rsh.Historymainlineid
INNER JOIN ResourceDef rd ON rd.resourceid = rsh.historyid
INNER JOIN a_equipmentparams aep ON rd.resourceid = aep.resourceid
INNER JOIN a_paramname apn ON aep.paramnameid = apn.paramnameid AND apn.paramnamename ='HANDLERID'
INNER JOIN A_WIPEquipment awe ON rd.resourceid = awe.equipmentid
INNER JOIN container c ON c.ContainerId = awe.ContainerId
INNER JOIN Product p ON c.productid = p.productid
INNER JOIN productbase pb ON p.productbaseid = pb.productbaseid
WHERE rd.Resourcename = :equipID
ORDER BY c.containername, hm.txndate;
谢谢大家！我还有一些问题，但我想我需要为此开始另一个问题。再次感谢所有帮助人员。