Difference In 2 Consecutive Records
Jun 18, 2007
Hi there
I am trying to get a very simple thing done in Access and I must have spent almost over 2 days of Internet time to do so. My problem is that I need to get the difference in 2 records to show in a query.
e.g. MyTable has 2 fields: 1. MyDate 2. MtrReading
Everyday I enter date in MyDate and a number in MtrReading. And I need to find out the difference between today's MtrReading and Yesterday's Mtr Reading.
Any help is greatly appreciated!
Thanks
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Jan 17, 2006
I am having a problem, probably due to my inexperience with Access. Here is the seniero:
-I have a form/table set up for operators to enter numbers on a daily basis.
-I am setting up queries/reports to display not only the entered data, but also calculated values from the entered values
--I have no idea on how to subtract a previous day's value from today's value and report that value.
- Since Access gives no "ownership" to any value I do not know how to reference yesterday's value in today's calculation.Any Ideas?
Example
Record #1
Date - 1/17/06
Value - 15,232
Record #2
Date - 1/16/05
Value - 14,111
Desired output
Date 1/17/06
Value - 1121
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Aug 14, 2006
Hello,
I am trying to generate some query result on a form.
My DB consists of the following fields : tradeID and profit/loss.
How do i make a query to find the Maximum consecutive number of wins and losses in the database and display the results on a form?
Would really appreciate it if any of you have tried to sort and display results for finding consecutive number of events in any database!
Thanks a lot
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Jan 25, 2006
I want to place a control in a report footer that will return the highest number of consecutive weeks that a profit was earned. The database has fields named WeekNo and Net. The Net field contains positive values (profit) and negative values (losses). The WeekNo field is an integer from 1 to 52 designating the week number.
For example if the figure in the Net field is a positive number I want the control to count the number of consecutive weeks that a profit was earned. I know how to get the value of total weeks that a profit was earned; this is not what I am looking for. The control must return the highest number of CONSECUTIVE weeks that a profit was earned over the year.
Any help would be appreciated.
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Jul 25, 2014
I have looked all over for a way to calculate the difference between water meeter readings. My brain may be Friday slow, but all I can find is for calculating differences in dates. My water table has 3 fields: ReadDate, Reading, Calc1
ReadDate is the date the water reading occurred
Reading is the meter reading
Calc1 is calculated (when I find out how!) by subtracting the current reading from the previous day's reading.
I would like to add the write script in my form so when the readings are entered, the calculation auto populates the field for the user.
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Nov 1, 2007
I'm new to building databases and I wouldn't think that this is difficult but it has stumped me and everyone that I have approached to elegantly perform this calculation.
Essentially I have a table of meters (the best real world example is the watermeter that your community uses to measure how much water you use each month.) Each meter in the table has a "child table" of the date/time that the meter was read and the reading on the meter (stored as a number). I need to calculate the difference between the last two readings in the child table for each meter(essentially how much water each meter has used since the last reading.)
I have been able to sum, average, etc. the meter readings, but I can't seem to find a way to get a difference.
Thanks in advance,
Corwin
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Sep 8, 2005
I currently have a table with the following fields:
dtmDateintPressintCycleintProgramintLotysnAxialdtmFStartdtmFFinishdtmPStartdtmPFinishdtmDStartdtmDFinish
How might I go about querying the difference between dtmDFinish and dtmFStart for multiple records?
EX:
09/07/05-1-1-1-5681-NO-12:30-1:00-1:30-2:00-2:30-3:00
09/07/05-1-1-1-5681-NO-3:30-4:00-4:30-5:00-5:30-6:00
09/07/05-1-1-1-5681-NO-6:15-6:45-7:30-8:00-10:30-11:00
Would return two results: difference for 3:30-3:00 = 30 minutes and difference for 6:15-6:00 = 15 minutes
Thanks for your help!
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Aug 12, 2015
I have a query that must calculate the different between values in two different records, based on the date.
The underlying ORIGVALUES table contains:
Date; Value; Diff
1/10/15; 100; (this is what I am trying to calc)
1/11/15; 101; (this is what I am trying to calc)
1/14/15; 102; (this is what I am trying to calc)
What is the best way to have each record calculate the selected date value divided by the prior date value)? E.g.
For 1/11 the math is 101 / 100 (so the 1/11/15 record would show the result of 1.01)
For 1/14 the math is 102 / 101 (1/11 to 1/14 represents a weekend)
I could copy the prior day values to the current day records and do that math easily but that is very redundant.
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Dec 5, 2007
I have atable the is storing ID, attendance_year and meeting code. Iw ould like to query the table and identify the IDs that have 10 consecutive attendance years no matter when it may have occured. So IDs have more than 10 row of data but not necassrily 10 years in a row.
How can I do this?
table looks like
123|2003|WIN03
123|2001|SUM02
456|2001|WIN01
456|2000|WIN00
456|2002|SPR02
456|2006|SUM06
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Mar 21, 2006
Firstly I have placed this in the general section as I am not quite sure if any vba would need to be created for the following. I would also like to report on the information but the answer may not be done at report level.
Anyway, I have created a very basic database that holds staff attendance and their reason for being absent.
tblattendance:
AttendanceID
AttendanceType
StaffID
AttendanceDate
What i would like to do is group consecutive dates if they are all the same type and show them as DateFrom and DateTo
So for example, for someone who is on holiday between 01/Jan/06 and 06/Jan/06 I could show that as:
DateFrom 01/Jan/06
DateTo 06/Jan/06
I am not sure if that is explained very well but I will try to explain a bit more clearly if needed?
Thanks for any help.
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May 19, 2005
Hi,
Is it possible to count the number of consecutive days in a table?
I need a query to calculate for a particular customer the number of consecutive days thay have logged a record if its greater than 1
EG: Table layout:
CUST A RC1 05/05/05
CUST A RC2 06/05/05
CUST A RC3 07/05/05
CUST A RC4 08/05/05
CUST A RC5 15/05/05
CUST A RC6 18/05/05
Possible query results:
CUST A 4 Days First 05/05/05 Last 08/05/05
Is it possible to do something like this??
Thanks in Advance
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Aug 17, 2014
I have a Student Attendance table and it would be great if I could get some way of automatically determining if the attendance status is Absent - Unexcused for two or more consecutive sessions in order for someone to get in contact with the student.
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Sep 19, 2013
I have a table of employees, and dates they worked on. These are seasonal employees who want to get in as many days as possible before the season ends, but regulation states they must take a compulsory rest day after x days.So I need to create a query that can return the list of employees, with a count of consecutive workdays up until current date.
If today is 20/09/2013, and Johnny worked on, 19, 18, 17, 15, 14, 13, his count must be 3, because he was absent on 16. Therefore only from 17 through 19 is regarded as consecutive.
If Peter worked 19, 18, 17, 16, 15, 14, 13, his count would be 7, because unlike Johnny, Peter still worked on 16.
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Jul 19, 2015
I have data for multiple account numbers (for work) and dates, and I need to identify when there is a change in account number in order to add a new field with a count - which counts sequentially starting with 1 and then starts over at 1 when the account number changes.
Ex. The red column is what I am trying to create
Account Date_To Counter
12345 06/30/2015 1
12345 05/31/2015 2
12345 04/30/2015 3
19999 06/30/2015 1
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Oct 14, 2005
Hi there,
Some scene setting to my problem. I have a corporate system numbering invoices consecutively globally. For a subsidiary in Poland this presents a problem - all invoices for the subsidiary must be consecutive. ie. where the globally issued invoices for Poland might be 1,4,5,7 these need to be renumbered before issue in Poland.
It gets more complicated as the Polish Office standard is to invoice in the format "PL/Year/Month/Number" with the Number restarting from 1 for each month.
My database is very simple.
Table 1 = Link table to Oracle corporate data
Table 2 = Local table of invoices already produced (Global invoice number and date recorded)
I have a filter to find all new invoices (unmatched items), a report to print them and an Append query to populate the new items to the Local table.
My challenge: (1) to recreate the Polish numbering scheme and (2) have it consistently when existing data goes up to mid month and a new append operation has to follow the invoice number sequence.
Any ideas? I guess Autonumber is no good and I have little array experience.
Thanks
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Jun 16, 2013
102,34112,021502503130010010000,QAR,1,24,1,{NULL:0 },{5:Y},6,14.5,31-MAR-2011
Above data is in one field , i want and expression to extract the data between two consecutive comma set by specifying the comma range.
For example if i specify range 2 to 3 then formula should return "021502503130010010000"
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Dec 1, 2013
Is it possible to list out each consecutive date in a report when given a range of dates without having to create a table of dates?
For example, given the date range 12/01/2013 to 12/05/2013:
In report:
12/01/2013
12/02/2013
12/03/2013
12/04/2013
12/05/2013
Is it possible to do this dynamically in vba?
I want to ultimately join this to a recordset for the report.
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Jul 16, 2013
I am setting up VBA to run multiple append queries in consecutive order. The append queries are supposed to pull a four digit number off of a form that will allow them to know which data to append. I want the number to be stored as text to correspond with the tables I am working with, but I am having trouble getting the form to work.
Here is how I would like it to work:
I enter my 4 digits in the text box on the form. Say "1305" for May 2013. I want to then run my vba (my queries update using the forms!txtupdatequery!textbox I have put in the criteria of the queries) and all of them run.
I enter my date (as a number but I want it to be text) and the form gives me a #name? error.
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Sep 17, 2014
I am trying to create a form that creates an automatic identifier with a value one greater than the previous identifier. I was able to create something that updates in batches of two: That is, I end up with identifiers that go 1, 2, 2, 3, 3, 4, 4, etc. How do I get it to create consecutive identifiers (1, 2, 3, 4, etc.)?
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Oct 23, 2013
I have a quick (hopefully) query about adding up consecutive values to get a running total.
Currently I have the following
ID Value
1 0
2 5
3 2
4 0
5 1
6 30
7 2
etc...
I am looking for a way to get a running total up to the point of a 0 then restarting. e.g.
ID Value Running total
1 0 0
2 5 5
3 2 7
4 0 0
5 1 1
6 30 31
7 2 33
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Jul 31, 2013
I have list of candidates shown in report. I need each candidate to have a unique number based on user input. And this number increases by 1 for the rest of the candidates in the report.
Example is below:
If user enters 1132 in the user input box then the numbers shown in report should be as below:
Name Assignment Number
Felicity Thomas 1132
Andrew Sen 1133
Andy Luker 1134
Similarly if number entered is 2345 then the numbers shown in the report will be:
Name Assignment Number
Felicity Thomas 2345
Andrew Sen 2346
Andy Luker 2347
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Apr 28, 2007
Could someone clarify the difference between DAO and ADO?
We migrated to Office 2003 last year - some large organizations move at the speed of continental drift. The database is written in Access 2002 (finally have most of it up and running - with thanks), but I need to really understand the difference for the documentation - to see if there are any issues that might undermine the database during the upgrade.
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Feb 24, 2008
Hey
How can I calculate the difference between two rows like:
value____diff
4________4
7________3
12_______5
/Thanks
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Jun 2, 2005
Hi, I have two tables, one being a subset of the other. What I want to do is write a query that lists data in the larger table that is not in the smaller one. In effect I want to subtract the data in the smaller table from the larger table and list the remainder.
I have tried something like:
Select a.oem from a,b where a.oem not in (select b.man from b);
This query does not complete and I get 100% CPU usage :( . The largest of the tables has roughly 4000 records in it. Any ideas? Am I doing something wrong?
Thanks
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Jan 18, 2006
I have a Transactoin Table that holds the following fields:
TransID (*Primary Key Numerical Value)
OrderID (Non Unique Number Value, One Order can have multiple Transactions attributed to it.
Status (Numerical Value ranging from 0 to 32, each is a different phase in the life of a transaction such as 0 means Transation Created, 1 through 31 are various actions with 32 beign the transaction closing)
Date (The date in which a particular phase of a particular transaction happened.)
Reason (The Description of a phase. This is the only text field whose contents are relative to the Status field in the same table.)
I need to find the amount of time passed from the first Transaction to the last transaction of each individual order, which will be displayed in a report. Unfortunately not every order goes through all 32 phases, in fact most dont. The individual orders have a random amount of phases that they go through but each have a starting one (which ranges from 0 onwards) and an ending one (once again it is not necessarily 32). The dates correspond to the numbers in an individual order which means that if an order has the following phases:
1
2
4
6
Then the dates of each phase will be one after the other like the Status Number as shown above. Anybody knows how to do this? I need to find how much time passed from the first transaction to the last for each individual order qand display it in a report.
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Jan 30, 2006
This has probably been raised before but here goes anyway.
I have two fields in a table: time_in and time_out, both as date/time fields and formatted for short time with a mask in the form.
I need to calculate the time spent, i.e. time_in 10.00, time_out 12.15 therefore 2hours 15minutes.
any help much appreciated.
Jim
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