Gaps in data
Hi. I am trying to save a lot of data at a high frequency:
36 Analog Channels, 400 samples @ 4kHz per channel, each iteration.
I am saving the data inside my loop and this seems to cause a 20ms gap after each pass through. Is there a way to use the write to lvm vi outside the loop?
Yes. Producer/consumer architecture.
Search the forums for those words and you'll find numerous messages on it.
Similar Messages
-
Time Sparsity and Gaps in Data ???
Hi,
I have a cube with 7 dimensions and having over 70 million rows. I have made all dimensions including time to be sparse. Now the problem is that there are gaps in my data for certain days after I maintain cube, which seems strange. Also, the aggregation at lower levels(days) is not correct whereas aggregations on higher levels (like year) are absolutely correct.
On the other hand, if i dont make time dimension sparse then there are no gaps in data and everything looks fine. All aggregations are fine in this case in every level.
Can any1 explain this behaviour please ?
Regards.Hi Riccardo:
At your suggestion, I used the Convert From Dynamice Data to 2D array before saving the array using Write to Spreadsheet File. When I collected 2 seconds of data at 1,000 Hz, there are fewer than 200 lines of data in the spreadsheet file (no gaps in the data, see the txt file attached). For comparison, the file saved using Write to Measurement File has close to 1,000 lines (with gaps in the data, see the xlsx file attached). Thanks for your time.
John
Attachments:
A16D1_1000Hz_2s.txt 20 KB
A16D1_1000Hz_2s.xlsx 133 KB
Analog_16AI_1DI_Timed_Datalogging(WriteSpreadsheet).vi 116 KB -
I am using 2 USB-6009s to collect 16 channels of analog data and the 2 devices are not synced. The data files attached were collected at 1,000 Hz for 2 sec using the Write to Measurement File function.
1. When the data were saved as a text (lvm) file [the csv file attached], there are gaps in the data. However, there are no gaps when saved as an Excel file.
2. When saved as Excel with 'absolute' timestamps, the time column starts with 00.000 and then reset to 00.000 at non-regular intervals (as in the spreadsheet attached). The time column has continuous time when the 'absolute' option is deselected,
If the gaps are related to the non-synchronization of the 2 devices, why are there no gaps when saved as Excel files? Thanks for your time.
Attachments:
Analog_16Ch_Timed_Datalogging_Dell.vi 90 KB
AI16_1000Hz_2s(absolute timestamp).xlsx 126 KB
AI16_1000Hz_2s.csv 304 KBHi Riccardo:
At your suggestion, I used the Convert From Dynamice Data to 2D array before saving the array using Write to Spreadsheet File. When I collected 2 seconds of data at 1,000 Hz, there are fewer than 200 lines of data in the spreadsheet file (no gaps in the data, see the txt file attached). For comparison, the file saved using Write to Measurement File has close to 1,000 lines (with gaps in the data, see the xlsx file attached). Thanks for your time.
John
Attachments:
A16D1_1000Hz_2s.txt 20 KB
A16D1_1000Hz_2s.xlsx 133 KB
Analog_16AI_1DI_Timed_Datalogging(WriteSpreadsheet).vi 116 KB -
I have a table like this
DDL for table:
CREATE TABLE TEST1
ID VARCHAR2(20 BYTE),
HH_START DATE,
HH_END DATE
Data for table:
SET DEFINE OFF;
Insert into TEST1
(ID, HH_START, HH_END)
Values
('144813', TO_DATE('01/26/2010 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), TO_DATE('01/30/2010 00:00:00', 'MM/DD/YYYY HH24:MI:SS'));
Insert into TEST1
(ID, HH_START, HH_END)
Values
('144813', TO_DATE('01/30/2010 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), TO_DATE('11/18/2010 00:00:00', 'MM/DD/YYYY HH24:MI:SS'));
Insert into TEST1
(ID, HH_START, HH_END)
Values
('144813', TO_DATE('01/10/2011 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), TO_DATE('01/11/2011 00:00:00', 'MM/DD/YYYY HH24:MI:SS'));
Insert into TEST1
(ID, HH_START, HH_END)
Values
('944813', TO_DATE('01/26/2010 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), TO_DATE('01/30/2010 00:00:00', 'MM/DD/YYYY HH24:MI:SS'));
Insert into TEST1
(ID, HH_START, HH_END)
Values
('944813', TO_DATE('01/30/2010 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), TO_DATE('11/18/2010 00:00:00', 'MM/DD/YYYY HH24:MI:SS'));
Insert into TEST1
(ID, HH_START, HH_END)
Values
('944813', TO_DATE('01/10/2011 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), TO_DATE('01/11/2011 00:00:00', 'MM/DD/YYYY HH24:MI:SS'));
COMMIT;The table will contain multiple ID's. I just have 2 as sample. The reqiurement is we need to fill in the date gaps for each ID. For instance the final data for 144813 should look like:
ID HH_START HH_END
144813 1/26/2010 1/30/2010
144813 1/30/2010 11/18/2010
144813 11/18/2010 1/10/2011
144813 1/10/2011 1/11/2011
The gaps could be in many places. Thank you for your inputs.select id,
hh_start,
hh_end
from test1
union all
select id,
hh_start,
hh_end
from (
select id,
lag(hh_end) over(partition by id order by hh_start) hh_start,
hh_start hh_end
from test1
where hh_start != hh_end
order by id,
hh_start
ID HH_START HH_END
144813 26-JAN-10 30-JAN-10
144813 30-JAN-10 18-NOV-10
144813 18-NOV-10 10-JAN-11
144813 10-JAN-11 11-JAN-11
944813 26-JAN-10 30-JAN-10
944813 30-JAN-10 18-NOV-10
944813 18-NOV-10 10-JAN-11
944813 10-JAN-11 11-JAN-11
8 rows selected.
SQL> SY. -
I was recently asked to help create a query at my company to search for date gaps in employment status history. My table data looks similar to this
employee_id employment_status beg_date end_date
1 Active 1990-01-01 1991-01-01
1 Leave 1991-02-01 1993-06-03
1 Active 1993-06-04 1995-02-01
1 Fired 2000-06-01 2299-12-31
So the gap im looking for would be from 1995-02-01 and 2000-06-01
Unfortunately as well, I dont have admin access to the database in order to be able to create an index, or do any fancy PL/SQL, im pretty much limited to the most basic SQL possible.
Any help appreciated!If your database supports analytic functions, the following query should give what you want.
with sample_data as (
select 1 employee_id, 'Active' employment_status, date '1990-01-01' beg_date, date '1991-01-01' end_date from dual union all
select 1, 'Leave', date '1991-02-01', date '1993-06-03' from dual union all
select 1, 'Active', date '1993-06-04', date '1995-02-01' from dual union all
select 1, 'Fired', date '2000-06-01', date '2299-12-31' from dual
select employee_id,
employment_status as last_status,
end_date as gap_lower_bound,
next_date as gap_upper_bound,
next_status
from
select t.*,
lead(beg_date) over(partition by employee_id order by beg_date) next_date,
lead(employment_status) over(partition by employee_id order by beg_date) next_status
from sample_data t
where next_date > end_date + 1
EMPLOYEE_ID LAST_STATUS GAP_LOWER_BOUND GAP_UPPER_BOUND NEXT_STATUS
1 Active 01/01/1991 01/02/1991 Leave
1 Active 01/02/1995 01/06/2000 Fired
Note #1 : the WITH clause is just there to generate some test data "on-the-fly", you can remove it and use your real table in place of SAMPLE_DATA in the main query.
Note #2 : unless you made a typo, the gap 01/01/1991 to 01/02/1991 should also be retrieved.
BTW, for specific questions about SQL or PL/SQL please use the {forum:id=75} forum.
Edited by: odie_63 on 27 févr. 2011 17:16 -
Hi!
I have the following problem.
Data:
range_id actual_nr
AAA 001AAA
AAA 002AAA
AAA 003AAA
AAA 006AAA
AAA 007AAA
AAA 009AAA
BBB 001BBB
BBB 002BBB
etc.
I have to get report in the following form
from to nr_of_rows
001AAA 003AAA 3
006AAA 007AAA 2
009AAA 1
001BBB 002BBB 2
etc.
As you can see if there is a gap in sequence then I have to calculate how many rows were in sequence before the gap.
Can somebody give me some hints or even working statement?How's this?
WITH
Sample_Data
AS
SELECT 'AAA' range_id, '001AAA' actual_nr FROM Dual UNION ALL
SELECT 'AAA' range_id, '002AAA' actual_nr FROM Dual UNION ALL
SELECT 'AAA' range_id, '003AAA' actual_nr FROM Dual UNION ALL
SELECT 'AAA' range_id, '006AAA' actual_nr FROM Dual UNION ALL
SELECT 'AAA' range_id, '007AAA' actual_nr FROM Dual UNION ALL
SELECT 'AAA' range_id, '009AAA' actual_nr FROM Dual UNION ALL
SELECT 'BBB' range_id, '001BBB' actual_nr FROM Dual UNION ALL
SELECT 'BBB' range_id, '002BBB' actual_nr FROM Dual
SELECT
MIN(actual_nr_start) actual_nr_start,
actual_nr_finish,
MAX(Total)
FROM
SELECT
range_id,
MIN(actual_nr) actual_nr_start,
MAX(actual_nr) actual_nr_finish,
MAX(Level) Total
FROM
Sample_Data
CONNECT BY
range_id = PRIOR range_id
AND substr(actual_nr, 1, 3) = substr(PRIOR actual_nr, 1, 3) + 1
GROUP BY
range_id,
CONNECT_BY_ROOT actual_nr
GROUP BY
actual_nr_finish
ORDER BY
SubStr(actual_nr_start, -3),
actual_nr_start;Message was edited by:
Brian Tkatch 2
consolidated two levels. -
SQL Lead & Lag to find gap between dates
i have a table with two columns event_start and event_end :
CREATE TABLE MYBATCHTAB
EVENT_START DATE NOT NULL,
EVENT_END DATE NOT NULL
and my data is :
Insert into MYBATCHTAB
(EVENT_START, EVENT_END)
Values
(TO_DATE('08/12/2013 22:45:00', 'MM/DD/YYYY HH24:MI:SS'), TO_DATE('08/12/2013 23:55:00', 'MM/DD/YYYY HH24:MI:SS'));
Insert into MYBATCHTAB
(EVENT_START, EVENT_END)
Values
(TO_DATE('08/12/2013 15:30:00', 'MM/DD/YYYY HH24:MI:SS'), TO_DATE('08/12/2013 17:00:00', 'MM/DD/YYYY HH24:MI:SS'));
Insert into MYBATCHTAB
(EVENT_START, EVENT_END)
Values
(TO_DATE('08/12/2013 16:00:00', 'MM/DD/YYYY HH24:MI:SS'), TO_DATE('08/12/2013 17:30:00', 'MM/DD/YYYY HH24:MI:SS'));
Insert into MYBATCHTAB
(EVENT_START, EVENT_END)
Values
(TO_DATE('08/12/2013 20:00:00', 'MM/DD/YYYY HH24:MI:SS'), TO_DATE('08/12/2013 22:00:00', 'MM/DD/YYYY HH24:MI:SS'));
COMMIT;
Event Start
Event End
08/12/2013 15:30:00
08/12/2013 17:00:00
08/12/2013 16:00:00
08/12/2013 17:30:00
08/12/2013 20:00:00'
08/12/2013 22:00:00
08/12/2013 22:45:00
08/12/2013 23:55:00
and i want to find the first whole start - end period in this example start : 15:30 - end 17:30 (merging record 1&2 )
but not the third one for example not 15.30 - 22:00 or not 15.30 23:55 because there are gaps between end dates.
how can i do this using lead&lag ?
I'm not sure if this is the best approachMaybe a baby-step solution
select event_start,event_end
from (select event_start,
case when overlap is not null
then case when lead(overlap,1) over (order by event_start) is not null
then lead(event_end,1) over (order by event_start)
when lag(overlap,1) over (order by event_start) is not null
then null
end
else event_end
end event_end
from (select event_start,event_end,
case when lead(event_start,1) over (order by event_start) <= event_end
or lag(event_end,1) over (order by event_start) >= event_start
then 'overlap'
end overlap
from mybatchtab
where event_end is not null
order by event_start
EVENT_START
EVENT_END
08/12/2013 15:30:00
08/12/2013 17:30:00
08/12/2013 20:00:00
08/12/2013 22:00:00
08/12/2013 22:45:00
08/12/2013 23:55:00
or when there can be more than two consecutive overlaps
select event_start,
event_end
from (select case when lag_overlap is null
then event_start
end event_start,
case when coalesce(lead_overlap,lag_overlap) is null
then event_end
when lag_overlap is null and lead_overlap is not null
then lead(event_end) over (order by event_start)
end event_end
from (select event_start,event_end,
case when event_start < lag(event_end) over (order by event_start)
then 'overlap'
end lag_overlap,
case when event_end > lead(event_start) over (order by event_start)
then 'overlap'
end lead_overlap
from mybatchtab
where lead_overlap is null
or lag_overlap is null
where event_end is not null
and event_end is not null
order by event_start
Regards
Etbin -
[Bug?] Hypertrend Draws 'Fake' Gaps in Data
Hi
I have noticed Hypertrend drawing gaps in the data (when there is actually data there). This can be confirm when you zoom in on the data. Is this a known issue, or is there any workaround/configuration? The images are from Hypertrend in LabVIEW, but we have seen it in MAX too.
Cheers
-JG
Certified LabVIEW Architect * LabVIEW Champion
Solved!
Go to Solution.Here are some prior discussions on the subject...
http://forums.ni.com/t5/Real-Time-Measurement-and/Distributed-System-Manager-Historical-Trend/m-p/99...
Also see attachment for a Jing video of the problem. This occurs in DSM 2009 and 2010 and on multiple machines.
Here is the final result after much rangling with NI:
From: Mark Black [mailto:[email protected]]
Sent: Thursday, January 21, 2010 4:53 PM
To: Sachs, Michael A. (MSFC-ET30)[Intelligent Systems]
Cc: Roger Hebert
Subject: Re: DSM issues
Hi Mike,
We do have a CAR for this issue (#178809), but its a general CAR for these
types of Hypertrend drawing issues that your case fits into. Currently
this bug is not targeted to be fixed for SP1, but I have contacted our Shanghai
development team for more an update. Have you seen this issue on multiple
different systems? Have you seen this issue with plots not tied to your
GPS synched cRIO?
Thanks,
Mark Black
Product Support Engineer - LabVIEW R&D
National Instruments
[email protected]
(512) 683-8929
Attachments:
2010-10-18_0907.zip 3018 KB -
Find the latest Start date after a gap in date Field For each id
Hi All, Can anyone help me in this, as it is so urgent ..My requirement is to get the latest start date after a gap in a month for each id and if there is no gap for that particular id minimum date for that id should be taken….Given below the scenario
ID StartDate
1 2014-01-01
1 2014-02-01
1 2014-05-01-------After Gap Restarted
1 2014-06-01
1 2014-09-01---------After last gap restarted
1 2014-10-01
1 2014-11-01
2 2014-01-01
2 2014-02-01
2 2014-03-01
2 2014-04-01
2 2014-05-01
2 2014-06-01
2 2014-07-01
For Id 1 the start date after the latest gap is 2014-10-01 and for id=2 there is no gap so i need the minimum date 2014-01-01
My Expected Output
id Startdate
1 2014-10-01
2 2014-01-01
Expecting your help...Thanks in advanceIf you're using SQL Server 2012 this will work for you...
IF OBJECT_ID('tempdb..#temp') IS NOT NULL
DROP TABLE #temp
GO
CREATE TABLE #temp (
ID INT,
StartDate DATE
INSERT #temp (ID, StartDate) VALUES
(1,'2014-01-01'),
(1,'2014-02-01'),
(1,'2014-05-01'),
(1,'2014-06-01'),
(1,'2014-09-01'),
(1,'2014-10-01'),
(1,'2014-11-01'),
(2,'2014-01-01'),
(2,'2014-02-01'),
(2,'2014-03-01'),
(2,'2014-04-01'),
(2,'2014-05-01'),
(2,'2014-06-01'),
(2,'2014-07-01')
-- SQL 2012 and later --
;WITH gg AS (
SELECT
COALESCE(DATEDIFF(mm, LAG(t.StartDate, 1) OVER (PARTITION BY t.ID ORDER BY t.StartDate), t.StartDate), 2) AS GetGap
FROM #temp t
), did AS (
SELECT DISTINCT t.ID FROM #Temp t
SELECT
did.ID,
x.StartDate
FROM
did
CROSS APPLY (
SELECT TOP 1
gg.StartDate
FROM gg
WHERE did.ID = gg.ID
AND gg.GetGap > 1
ORDER BY gg.StartDate DESC
) x
If you're on an earlier version than 2012, let me know. It's an easy rewrite but the final code isn't as efficient.
Jason Long -
Hi All
I have the following records:
--Drop Table
drop table agreement;
drop table GRP_INFO;
--Create table
create table agreement
Agreement_Id Number(5),
Coverage_Effective_Date Date,
COVERAGE_termination_date date
Create Table GRP_INFO
Agreement_Id Number(5),
Grp_Id Number(5),
Effective_Date Date,
TERMINATION_DATE Date
--Insertion
Insert Into Agreement
Select 100,'01JAN-2013','31-DEC-2013'
From Dual;
Insert Into Agreement
Select 200,'01JAN-2013','31-DEC-2013'
From Dual;
Insert Into Agreement
Select 300,'01JAN-2013','31-DEC-2013'
From Dual;
Insert Into Agreement
Select 400,'01JAN-2013','31-DEC-2013'
From Dual;
Insert Into Grp_Info
Select 100,1,'01-JAN-2013','31-MAR-2013'
From Dual
UNION ALL
Select 100,2,'01-APR-2013','02-APR-2013'
From Dual
UNION ALL
Select 100,3,'03-APR-2013','15-APR-2013'
From Dual
UNION ALL
Select 100,4,'03-APR-2013','15-APR-2013'
From Dual
UNION ALL
Select 100,5,'01-JUN-2013','31-DEC-2013'
From Dual
Union All
Select 200,6,'01-JAN-2013','02-APR-2013'
From Dual
Union All
Select 200,7,'03-APR-2013','15-APR-2013'
From Dual
Union All
Select 200,8,'03-APR-2013','15-APR-2013'
From Dual
Union All
Select 200,9,'01-JUN-2013','30-NOV-2013'
From Dual
Union All
Select 300,10,'01-JAN-2013','15-APR-2013'
From Dual
Union All
Select 300,11,'16-APR-2013','31-DEC-2013'
From Dual
Union All
Select 400,12,'02-JAN-2013','31-DEC-2013'
From Dual;
COMMIT;
--Query on agreement table
Select * from Agreement;
--Query Result
agreement_id coverage_effective_date coverage_termination_date
100 01-JAN-13 31-DEC-13
200 01-JAN-13 31-DEC-13
300 01-JAN-13 31-DEC-13
400 01-JAN-13 31-DEC-13
--Query on grp_info table
agreement_id grp_id effective_date termination_date
100 1 01-JAN-13 31-MAR-13
100 2 01-APR-13 02-APR-13
100 3 03-APR-13 15-APR-13
100 4 03-APR-13 15-APR-13
100 5 01-JUN-13 31-DEC-13
200 6 01-JAN-13 02-APR-13
200 7 03-APR-13 15-APR-13
200 8 03-APR-13 15-APR-13
200 9 01-JUN-13 30-NOV-13
300 10 01-JAN-13 15-APR-13
300 11 16-APR-13 31-DEC-13
400 12 02-JAN-13 31-DEC-13
--Result
agreement_id
100
200
400
--Logic for the above result
Each agreement_id have multiple grp_id and all grp_id or atleast one should cover all period agreement_id for example:
- Agreement_id 100 has coverage effective date is 01-Jan-2013 and coverage_termination_date is 31-Dec-2013 and if you look into all record against agreement_id 100 then you can find that the period from 16-Apr-2013 till 31-May-2013 are missing so I need this agreement_id.
- Agreement_id 200 has coverage effective date is 01-Jan-2013 and coverage_termination_date is 31-Dec-2013 and if you look into all record against agreement_id 200 then you can find that the period from 01-DEC-2013 till 31-DEC-2013 are missing so I need this agreement_id.
- Agreement_id 300 has coverage effective date is 01-Jan-2013 and coverage_termination_date is 31-Dec-2013 and if you look into all record against agreement_id 300 then you can find that no period is missing so I don't need this agreement_id.
- Agreement_id 400 has coverage effective date is 01-Jan-2013 and coverage_termination_date is 31-Dec-2013 and if you look into all record against agreement_id 300 then you can find that the period from 01-JAN-2013 till 01-JAN-2013 is missing so I need this agreement_id.
Please let me know if you have any questions related to my scenario and I really appreciate if someone provide me solution for this issue.
Regards
ShumailHi,
Here's one way:
WITH got_gap AS
SELECT agreement_id, effective_date, termination_date
, CASE
WHEN effective_date >
1 + MAX (termination_date) OVER ( PARTITION BY agreement_id
ORDER BY effective_date
ROWS BETWEEN UNBOUNDED PRECEDING
AND 1 PRECEDING
THEN 1
END AS gap
FROM grp_info
SELECT g.agreement_id
FROM got_gap g
JOIN agreement a ON a.agreement_id = g.agreement_id
GROUP BY g.agreement_id
HAVING COUNT (g.gap) > 0
OR MIN (g.effective_date) > MIN (a.coverage_effective_date)
OR MAX (g.termination_date) < MAX (a.coverage_termination_date)
ORDER BY g.agreement_id
Output:
AGREEMENT_ID
100
200
400
This makes no assumptions about effective_date and termination_date, except that effective_date <= termination_date on each row. It's okay if different rows for the same agreement_id overlap, or if one encompasses another.
Don't try to insert VARCHAR2 values (such as '01-JAN-2013') into DATE columns. Use TO_DATE, or DATE literals. -
Hi,
I needed to compute the gap time between employments for my database. The problem I am running into right now is I am computing unnecessary calculations. For example,
Employment table:
job start date end date
A 13-01-2000 17-09-2002
B 25-02-2003 23-07-2004
C 22-01-2005 15-09-2007
My query is as follows:
SELECT A.job as Job1, B.job as Job2, (B.Start_Date - A.End_Date) as Gap_Time
FROM Employment A, Employment B
WHERE A.Start_Date != B.Start_Date AND A.End_Date != B.End_Date AND A.End_Date < B.Start_Date;
The problem is, I should only be getting the gap times between jobs (A,B) and then (B,C), but my query also computes the gap time between A and C (there shouldn't be one though because C does not directly follow job A so that wouldn't be a gap time between jobs). I've tried to mess around with the different types of joins for the FROM part of the query but still haven't been able to figure this out. Thanks.Look at the Analytic Functions and specifically the key words LAG and LEAD.
There is a lot of good advice at http://asktom.oracle.com and some demos in Morgan's Library at www.psoug.org. -
Finding gaps between dates in table
Is this following possible in sql...
Lets say I have a "sales" table with these fields
SalesMan, SaleDate, Amount.
and this data
John, 6/may/07,90
John, 4/may/07,330
John, 2/may/07,200
John, 9/apr/07,300
John, 5/apr/07,300
Dave, 9/jul/07,90
Dave, 8/jul/07,90
Dave, 4/jul/07,330
Dave, 2/jul/07,200
Dave, 4/jun/07,300
Dave, 2/jun/07,300
I want to ask the database "show me the third sale made by each sales man after any 2 week gap in sales"
Here's the same data again...
John, 6/may/07,90 --- I want this one
John, 4/may/07,330
John, 2/may/07,200
<2 week gap>
John, 9/apr/07,300
John, 5/apr/07,300
Dave, 9/jul/07,90
Dave, 8/jul/07,90 --- and this one
Dave, 4/jul/07,330
Dave, 2/jul/07,200
<2 week gap>
Dave, 4/jun/07,300
Dave, 2/jun/07,300
My actual problem is more complicated but this is it in its most basic form.
Any help is much appreciated.That's easy enough using the LAG analytic funtion.
with testdata as (select 'John' name, to_date('6/may/07') sdate, 90 amount from dual
union all select 'John', to_date('4/may/07'), 330 from dual
union all select 'John', to_date('2/may/07'), 200 from dual
union all select 'John', to_date('9/apr/07'), 300 from dual
union all select 'John', to_date('5/apr/07'), 300 from dual
union all select 'Dave', to_date('9/jul/07'), 90 from dual
union all select 'Dave', to_date('8/jul/07'), 90 from dual
union all select 'Dave', to_date('4/jul/07'), 330 from dual
union all select 'Dave', to_date('2/jul/07'), 200 from dual
union all select 'Dave', to_date('4/jun/07'), 300 from dual
union all select 'Dave', to_date('2/jun/07'), 300 from dual
), sales_gaps AS (
select name, sdate, amount,
lag(sdate,2) over (partition by name order by sdate, amount) -
lag(sdate,3) over (partition by name order by sdate, amount) delta
from testdata
SELECT NAME, SDATE, AMOUNT FROM SALES_GAPS WHERE DELTA >= 14
NAME SDATE AMOUNT
Dave 08-JUL-2007 12:00:00 90
John 06-MAY-2007 12:00:00 90
2 rows selected -
Scheduling a background Job with gaps in dates
Hi Experts,
I am having a requirement : A background job has to be scheduled for running a program every 15 minutes and for every month.But this job should not run from date 10th to 15th of every month.For example,In july month Job should start run from 01.07.2014 to 31.07.2014 excluding 10.07.2014 to 15.07.2014.
Can we achieve this without a custom program and using SM36?
Regards,
Arun.Hello Arun,
is it possible to define a factory calendar to you in the system, if you can define one then you can define the 10-15 the of every month as holiday.
We can select the factory calendar above defined in the job. This can be found by clicking on the restrictions button in the start condition screen.
in that start date restrictions, you can find 5 options in those you can pick the do not execute the periodic job on sunday and holidays.
but this will effect the sundays which are falling in 1-10 th & 15-31st of each month, will that be OK ?
if you do not want to try out the above all steps, then you can simply create 2 job running for each month
1st one for 1-10th of every month.
2nd one for 16th to end date.
Let us know in case of any concerns on the same.
thanks,
Bhaskar -
Incremental BACKUP to resolve large gap in Data Guard
Hi, all,
We run into a situation that standby database was shutdown for a long time and had a large gap between the primary and standby. I am interested in the idea to use incremental backup from primary db to resolve the gap. Does anyone know the procedure to do the work? Our environment is Oracle 10g RAC R2 on both primary and standby, ASM. Any suggestions are highly appreciated. Thanks in advanceCheck Using RMAN Incremental Backups to Roll Forward a Physical Standby Database.
-
How do I fill in the gaps with data?
Hi,
I have paragraphs of data with a header which holds the ID I need to have against each row of that data.
I want the Patient ID to fill fields below that row (where the 'Obs' and sequential numbers are) until it gets to the next patient id, and then make it do the same again and again until the end.
Can this be done in a single SQL UPDATE statement?
Thanks Daniel
This is the data, this is all one column:
Patient ID=1000207 regimen=EFV+ZDV+ddI Randomization Date=26/03/2004
Obs
1
2
3
4
5
6
7
Patient ID=1000751 regimen=EFV+d4T+3TC Randomization Date=25/02/2004
Obs
8
9
10
11
12
13
14
Patient ID=1001379 regimen=LVP+d4T+3TC Randomization Date=17/03/2004
Obs
15
16
17
18
19
20
21
22
23
24
etc. etc.Hi,
welcome to the forum.
Please read SQL and PL/SQL FAQ
Kindly post sample data (CREATE TABLE and INSERT statements), explain the business requirement and post your expected output.
Don't forget to mention also your Oracle version as result of
SELECT * FROM v$version;When you put some code or output please enclose it between two lines starting with {noformat}{noformat}
i.e.:
{noformat}{noformat}
SELECT ...
{noformat}{noformat}
Regards.
Al
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