Avoiding Duplicate Dates
Mar 2, 2005
Hi there
I want to avoid duplicate dates in the date field of my form. It's a little more tricky than it sounds though. Imagine two fields in a form; one list box of eleven values and one date field. Once i have chosen a value from the list box i enter the date in the second field. It is ok for one value to have the same date as another value (in another record) but i don't want to have duplicate dates for one value. Any idea how to SIMPLY overcome this problem?
Not really looking to fully understand how it all works, i would be happy just to fix the problem.
Cheers
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Sep 21, 2015
I have a modest sized data base and have been having trouble keeping out duplicate records with the same last name, first name, and DOB. I know I could use all 3 fields as a primary key, but I would like a simpler way of checking for duplicates.
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Aug 1, 2014
If different people will be entering data into a "new donor" form, how do I keep them from adding the same person a second time?
It's possible people could have the same name, and it's possible that two people at the same address could be donors. So I assume I would want a "no duplicates" on the combination of name and address, right? But how to actually do that.
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Jan 9, 2013
I have tblWO_Points and column with firstname and lastname and dateWO column. What code do I use to prevent duplicate dates for same firstname and lastname? Also if a date is a duplicate that it wil ask if you want to go to that record?
Example:
Jane Doe Wednesday, January 07, 2012
Jane Doe Tuesday, January 06, 2012
Mike Doe Wednesday, January 07, 2012
Mike Doe Tuesday, January 06, 2012
Mike Doe Thursday, January 12, 2012
So the same dates can occur for different people but the same dates cannot be recorded for the same person.
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Jun 27, 2014
I have almost no experience of VBA outside of working a little with codes generated for me like docmd etc.
I am trying to create a database for resourcing staff.
I have a form where the user inputs a start date and an end date which updates a table.
I have a query that works out the number of working days between those dates.
I have a table with all the working dates between now and 2016
I want to put a duplicate record button on the form (I can do that bit)
The tricky part is I want it to create a new record for each date in the dates table between the start and end dates.
Example 23/06/2014-18/07/2014 = 20 working days. I want to end up with 20 records with start dates as below and the same end date.
23/06/2014, 24/06/2014,25/06/2014,26/06/2014,27/06/2014,30/06/2014,01/07/2014,02/07/2014,03/07/2014,04/06/2014,07/07/2014 etc up to 18/07
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Mar 14, 2008
I'm sure there's an easy solution to this somewhere...
I have a query that is supposed to assign a wage to a production job if the range output falls within a certain percentage range. For example, if they produce 125% to 130% of their goal, their wage is 15 cents higher. If it's between 130% and 135% of their goal, their wage is 30 cents higher. There are about 20 ranges that my bosses want set up. Short of making the longest Iif-Then-Else statement in history, does anybody have any suggestions? Should I use a separate table and somehow try to integrate it into the query?
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May 1, 2007
I have updated a database I created with additional reports, some UI
enhancements, etc., but have not changed anything about the table structure, field types, etc. The database has been in use for about a week by the user and I was working on my local copy. How do I provide the updated database to the user without incurring key violations on the auto-number PKs when their data is imported into the new version?
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Feb 26, 2007
I wish to avoid the SumOf, AvgOf prefix in queries. I am aware that I can write sales:sales but in a query with 50 columns that is somewhat annoying.
Any help would be appreciated.
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Mar 25, 2008
I have a query that is pulling data from a table containing a Tamestamp field. I want to set the query to pull my data but don't include anything that was logged in TODAY. How can I set this in my criteria?
Thanks
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Aug 25, 2005
Hi all.
I have three subforms on my main form. They all display salary details from different sources, and each subform has 2 calculated fields in the form footer to show the average salary and the number of records on which the average has been calculated.
I then have a field on the main form to calculate the average of the averages which works OK unless one of the subforms has null or zero in it, in which case it returns no information.
Can anyone suggest a way of bypassing this divide by zero error? The code I'm using to calculate the average of averages is as follows:
Me!Text44 = ((Me![Frm1 subform].Form!text4 * Me![Frm1subform].Form!Text6) + (Me![Frm2 subform].Form!text4 * Me![Frm2 subform].Form!Text6) + (Me![Frm3 subform].Form!Text6 * Me![Frm3 subform].Form!Text8)) / (Me![Frm1 subform].Form!Text6 + Me![Frm2 subform].Form!Text6 + Me![Frm3 subform].Form!Text8)
Thanks for any help you can provide...
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Mar 28, 2006
I have 4 queries needed to power one report. I've tried combining the queries into one so I can run the report off that. However, there is too much data and I get all sorts of errors. My only solution was to toss that data into a table thereby eliminating all the calculations and expressions and cleaning up the data. Is there a more elegant solution to this issue?
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Jun 5, 2005
Hi,
nuther question from the forum dunce I'm afraid,
I want to ensure the user of the form cannot enter the same [cboPlayerName]
twice for the same [txtMeetDate] (thanks for the advice trubolotta, I changed
the name of the [Date] field.) The user will select the PlayerName from a combo
box. Can I have the list in the combo box diminish by each player as they have
been selected for a [txtMeetDate] I suspect a monstrous amount of code &
intellectual input will be required to achieve this. Basically, what I'm asking
(this time !) is how can I have my program search my tblScratchScores for
duplicate names for the [MeetDate] that I am currently inputting Data for?
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Mar 28, 2006
I have 4 queries needed to power one report. I've tried combining the queries into one so I can run the report off that. However, there is too much data and I get all sorts of errors. My only solution was to toss that data into a table thereby eliminating all the calculations and expressions and cleaning up the data. Is there a more elegant solution to this issue?
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May 21, 2015
I have a function to write some data to a text file (as an activity log, separate to the live data contained in the DB)
It uses the FileSystemObject.OpenTextFile method and works fine
However, I'm conscious that, although perhaps unlikely, there is the possibility (which is enough for me to worry about it) that multiple users could trigger the function simultaneously, which could cause a conflict when multiple FE's try to write to the same log file at the same time.
So I'm trying to add some code to prevent this from happening, by checking if write-access is available before proceeding.
Below is the piece of code I've added. Was considering, as an alternative, looping until the objFile is no longer Nothing, rather than depending on the Err.Number?
Code:
Dim objFSO As Object
Dim objFile As Object
On Error GoTo ErrorHandler
...
Set objFSO = CreateObject("Scripting.FileSystemObject")
[Code] .....
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Feb 15, 2013
I want to store currency amounts but not use the currency format. My DB is set to use all currencies and provide in all currencies.
Do I use the SINGLE data type?
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Nov 10, 2013
I'm getting back into Access after retiring and about 10 years of isolation (from Access). I have 2010 version and know that one should avoid duplicate entries and a way to do this is make those fields unique key fields. I have a Customers table and have bounced back between CusID (AutoNumber) and Compound Keys (CusFName and CusLName) as the key fields. The compound keys prevent duplicates but become very hard to work with later in code and expressions. The CusID is preferable from that standpoint, but can't prevent inadvertent entry of duplicate names.
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Oct 9, 2006
Hi -
Currently I have MS Access DB which has some Oracle database table reference using database link concept. I have entered DSN Name,user id and password which it asks when I try to run some queries which will fetch data from oralce DB linked tables.If some wants to use my MS Access DB, they need to have DSN and everytime they run queries related to Oracle database table reference, it will ask for DSN,user id and password. For this I need to share the user id and password credentials to everyone who wishes to use my MS Access DB which I don't want to. Is there a way to avoid the login window whenever some one wants to use my MS Access DB without asking for oracle user id and password credentials everytime? My ultimate aim would be encrypt password for others.
Thanks,
Ashok
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Dec 7, 2007
Hi All,
I have an MS Access table that currently links into word as a mail merge. Great!
Sample data as follows:
Tutor Student
Mr A Donald Duck
Mr A Mickey Mouse
Mr A Minnie Mouse
Mrs B Joe Bloggs
I want to produce a mail document that allows me to address each tutor separately, along with the respective student names in a grid.
Now I've setup the document, but when I view each document it produces the list of all students for each tutor.
e.g.
Dear Mr A
Your students are:
Donald Duck
Mickey Mouse
Minnie Mouse
-------------------
Dear Mrs B
Your Students are:
Joe Bloggs
Is this at all possible?
Thanks:)
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Dec 30, 2013
We are working on an Access (2007) database that is on a SharePoint Site (2007).
Currently the form is operational, but there is one last thing that would be nice to have.
The table is "Updated Headcount" which contains "EMP_ID" which are unique numbers stored as text.
In the event a new employee is entered in the system by another user on this site we would like to prevent any duplicate "EMPID"s from being entered and saved on the SharePoint, we would also like to alert the user and prevent the data from being saved.
All data is currently bound, so once the user makes a change it is made, no submit button is required.
We are running into some difficulties in doing a dlookup from the value entered and comparing to a column in the table.
TABLE - UPDATED HEADCOUNT
COLUMN in UPDATED HEADCOUNT - EMPID
FORM CELL user will input an EMPID - newEMPID
FORM CELL used for a dlookup to compare what user has entered to what is already in the table - duplicateEMPID
So below is what we are trying to do, we are sure there are a few commands missing....
=IIF(newEMPID=dlookup([UPDATED HEADCOUNT]![EMPID]), newEMPID, "Error, EMPID already exists")
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May 12, 2014
Any way to have a form with Dates as column headers to update a table where the dates are stored in rows???
The table set up is like this:
tblOpHdr
DiaryID (PK) - OpDate (Date)
tblOpDetail
DiaryID (FK) - CostCode - MachineNumber - MachineHours - etc
I'm just wondering if there's any way I can do this with a datasheet or a crosstab type setup?
It's Access 2010.
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Aug 28, 2013
I have built a query to calculate the expiry dates of training courses but I am trying to input a criteria so that only dates within 90 days of todays date show. I am using Date()<90 but it doesn't return the correct information. What the criteria should be for this?
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Apr 9, 2015
I have a table of records, which has within it two date fields (effectively, a 'start' and 'end' date for that particular record)
I now need to create a query to perform a calculation for each date between the 'start' date and the 'end' date
So the first step (as I see it anyway) is to try to create a query which will give me each date between the two reference dates, in the hope that I can then JOIN that onto another query to perform the necessary calculation for each of the returned dates.
Is there a way to do this?
So basically, if for a particular record, the 'start' date is 01-Apr-2015 and the 'end' date is 09-Apr-2015, can I produce a dataset of 9 records as follows :01-Apr-2015
02-Apr-2015
03-Apr-2015
04-Apr-2015
05-Apr-2015
06-Apr-2015
07-Apr-2015
08-Apr-2015
09-Apr-2015
(The *obvious* solution would be to create a separate table of dates, from which I could just SELECT DISTINCT <Date> Between #04/01/2015# And #04/09/2015# - but that seems like a dreadful waste of space, if that table is only required to generate the above? And it would have to cover all possible options; so it would either have to be massive, and contain every possible date - ever! - or maintained, adding new dates as necessary when they are required. Seems horribly inefficient!)
Is it possible to just select each date between the two reference dates? Or can you only query something which exists somewhere in a table?
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Sep 7, 2006
Hiya-
I have a database with 5000 entries, corresponding to about 10 entries for about 500 people. Each of the entries is dated, and I need to calculate the time intervals between each person's sequential entries in the table.
One way of doing this is to create another column that contains the date of the previous entry. I can then use DateDiff to subtract one date from the other and give me the difference in days.
This approach falls down if I then work with only a subset of the entries - I would have to re-enter the previous entry dates as the time intervals would have changed.
What I really need is a way of subtracting the date from the date in the cell directly above it. Will Access let me do this, or is there a better way?
Many thanks, Jules.
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Jul 8, 2014
I have two tables with dates. Between (!) every two following dates in table1, I want to know the number of dates in table2. How do I write an SQL query for this? The tables I have are up to a few hundred records in table 1 and a few thousand records in table2. So to prevent that this takes hours I need a fast query.
To explain the query I need, for example:
table1
01/01/2014
15/01/2014
17/01/2014
30/01/2014
table2
01/01/2014
02/01/2014
05/01/2014
17/01/2014
18/01/2014
20/01/2014
21/01/2014
25/01/2014
So the answer of the query would be 2,0,4.
Explanation:
Between 01/01/2014 and 15/01/2014 in table 1 there are 2 dates in table2 (01/01/2014 is not included between the dates)
Between 15/01/2014 and 17/01/2014 in table 1 there are 0 dates in table 2
Between 17/01/2014 and 30/01/2014 in table 1 there are 4 dates in table 2
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Nov 15, 2011
I have a master table which shows all transactions per record (person) over a financial year.
Each record person has a seperate package period over which their spend needs to be measured. Therefore although I have all their transactions for the year, I only want to sum their transactions between their given [start date] and [end date] which are in columns.
I need to be able to create a field which sums all expenditure per record between the start and end dates
Name Start Date End Date Invoice Date Amount
Matt 15/5/11 15/9/11 1/11/11 £100
Matt 15/5/11 15/9/11 7/7/11 £200
Matt 15/5/11 15/9/11 12/12/11 £200
In this case I would only want to sum 7/7/11 as this is between the start and end dates
I want to write something like sumif([Invoice Date] is between [start date] and [end date] - not sure where or how exactly
(The start date and end date will always be the same per person)
Is this possible in access?
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Nov 3, 2005
Hi,
Please bear with me here as it's a little involved.
I'm doing a staff profile website which includes a section where they can enter their annual/other leave details.
I decided to store their leave in two fields Start_Date | End_Date rather than each individual date that they took - the short and wide approach vs long and narrow.
This has left me needing to do a query that would return all the dates between the start and end dates inclusive.
Example:
StaffID---Start_Date---End_Date
---1-----12/12/2004--14/12/2004
Returns:
StaffID---Leave_Dates
--1-------12/12/2004
--1-------13/12/2004
--1-------14/12/2004
I appreciate i could do this using some script to loop through a recordset and build an array of dates but i wondered/hoped that it could be done using SQL.
As it is an asp page i can't use user defined functions in a VBA module in Access so the solution would need to be pure SQL.
Is this possible?
Any help v.much appreciated.
TS
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