Duplicate Validation

Feb 22, 2006

Hi,

I need to make a database which wont allow any double bookings.

I've got all my bookings in a query and when a new date is entered (via a new bookings form) I need to make sure that date entered doesn't already exist in the query. I have tried a DLookup but it didn't work, however that is more than likely to be a user error, heh.

I've jumped in at the deep end doing this database. I've only done a few step by step databases before hand and the Access Help has sometimes helped my problems but I just can't find the solution on my own for this, I need somebody elses help.

Thanks a lot

Forg

EDIT: sorry if this is in the wrong area, I couldnt think where to put it

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Create Expression In Validation Section Prevent Duplicate Values In A Field?

Sep 11, 2012

create an expression in the Validation section to prevent duplicate entries in a field. Please view Powerpoint file on slide 1 on attachment for More detail instructions. Instructions are in simple Text and images which makes it easy to understand. I am using Access 2003.

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Forms :: Prevent Duplicate Values With Alert After User Enters Duplicate Value

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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Validation

Apr 25, 2005

how can i validate a field so that the data entered must be between the values of 1 and 10?
thanks in advance

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Validation

Dec 4, 2006

I have a table called Inspection, there are two fields:

- Damage To Property // data type is Yes/No
- Damage Comments // data type is text

How would i go about setting the validation - if Damage To Property is data type "No", disable the "Damage Comments" field. (ie grey it out).

any help would be greatly appreciated..

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Possible Validation

Apr 18, 2007

Hello!

Can someone tell me how to do a validation. The one I am trying to do is check Track No is not duplicated.

I have added my database if you may need it.

Can someone help me please!

Thanks

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Validation Or VB

Feb 7, 2005

Hey peeps,

I have a problem. I want my field to become "[field], An " etc. when I type "An [field]" For example, if I type "The Hundred Years War" for the field, it automatically updates to "Hundred Years War, The". I would be happy with a simple validation rule that prohibits the use of "The, A or An" in the beginning of the field but i don't think that is posibble. If this requires VB, I don't know how to use the language and never worked with it. I am completely a novice in VB, but would still love to learn how to make it. :) If you could start me out then, I would appreciate it greatly. :D

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Validation Help

Mar 30, 2005

Hi im new round here but am working on a database and sum of the validation rules are confusing me now.

Ok i got a couple of things to ask:

1) What rule do i use to make sure only text is entered into the field, i cant use input masks as the size of the text put into the field will vary, as its names of people.

2) Is there a way to check that all the fields on a form have been entered? So if there not all entered an error appears?

3) Finally, is there a way to reset Autonumbers? or do i have to delete all the records and start frm scratch as my autonumbers have gone abiit crazy as sum records have been deleted so my table looks rather strange.

Thank you, help greatly appreciated :)

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Validation

Apr 14, 2005

Need a a validation rule to allow only "a" or "p" to be entered as data into the relevant fields, can someone help?

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Iif In Validation

Oct 11, 2005

Is it posible to use a iif statment in a validation statment ?
i have one table project and i want to check the occurens.

IIF ([ProjectStatus] = 1 ,[ProjectCompletedDate] = NULL, [ProjectCompletedDate]<> NULL)

when the projectstatus is 1, the date cant be filled in.
is this possible in access ?
or can it only be done form based?

thanks for the reply :)

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Validation Help

Dec 7, 2005

I have 2 fields called confirmed and paid.

I want to have a validation which will only allow confirmed to be clicked when paid is selected. I put this validation "Confirmed"<"Paid" in the properties part of the table but it doesnt work.

Can anyone help?

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Validation Help

Jan 21, 2006

Hello,

For my Year 12 Computing course, I need to develop a database which will take bookings for a village hall. The database consists of a Bookings Table, a Customer Data Table and a Hiring Cost Table. It is in the Bookings Table that I am having the most trouble.

I believe I have already solved my double booking dilemma by making the Date of Event and Type of Event fields in the Bookings Table into a composite key, thereby prohibiting the entering of data where Date of Event and Type of Event are the same, making them unique.

Here is my main problem at the moment, I need a validation rule on the Date of Event or perhaps the Date of Booking field which means a booking must be made at least a week, and no more than two months in advance of the date of event. The thing is this validation rule is only needed for occasional bookings. Present, again on the bookings table is a Booking Type field which has a lookup consisting of the following �Regular� and �Occasional�, regular meaning bookings that are made at the start of the year, for the whole year.

Ideally, I would like to have it so that when the booking type field is set to regular, the validation rule for the date isn�t needed, and when the booking type field is set to occasional, the validation rule for the date is needed/present.

Could anyone help me with this? As any help would be much appreciated.

Many thanks
Daniel

If anyone would like any screenshots of the Bookings Table, email me at daniel_goodman@hotmail.com

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Validation

Mar 12, 2006

How can I set validation for a text field where I restrict the number of characters? For example, if I only want the user to be able to input 12 characters or less, and more than one. >=1 And <=12 would that be correct?

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Age Validation

Sep 19, 2006

Hello!

I'm really new to Access and need help with a validation rule

Right, i have a 'Date of Birth' field and what would the validation rule be if i only want people over the age of 12 to be able to go any further?

I've tried various other rules found online but some just don't work...

Any help would be great!

Thanks

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Validation

Dec 5, 2006

Hi all, Very new to using ACCESS. I am trying to set a validation criteria to ensure that a postcode is imported correctly. An example of a UK post code is SP10 3PB - it may be entered as SP103PB. I need to set a validation criteria to allow either two. What is the format of the criteria to achieve this? Any clues please. Thanks Mike

Are there any useful sites that set out examples of validation criteria?

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Age Validation

Apr 29, 2007

Hi

I have a field for date of birth, however I want to make sure that the person is older than 17.

This is what I have at the moment but it doesn't seem to work:
<=Date()-6720

So what's the best way to do it?

Can you help me?

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Validation Help

Apr 9, 2005

Hello,

I am currently making a system for a sports centre and I need some help, I have created several forms one of which is for the coach's details.
On the coaches table we have a combo box which has all the different qualifications in it, we have 5 of these boxes but we want to it so that when one has been entered it cannot be repeated in the other boxes, also we want it so that when level 4 Tennis has been entered - levels 3,2 and 1 cannot be entered.

Any help on this would be great,

Pam

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Validation

Dec 14, 2005

Hi Guys,

I need to set validation rule on a field. I have done the the below:

Private Sub Form_BeforeUpdate(Cancel As Integer)

If IsNull(Me.SlideType) Then
MsgBox "You have not entered SlideType!", vbExclamation + vbRetryCancel, "Incomplete Form!"
Cancel = True
Me.SlideType.SetFocus
End If

It works fine, but I cant get it ignore it if I press cancel. Sometimes this data is not available so it has to stay empty. When I press retry it should take me to that field to make changes and with the cancel click it should allow me continue with the last command/action before the msgbox was brought up. Can anyone please help, thanks.

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Validation

Jun 21, 2006

Hi, does anyone know how to set fields(como-box) on a form to pop up a validation message when form:confused is attempted for saving without any data selected on the field. I have 5 fields and I wanted my users to get a message for each when left empty...help please:confused:

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Validation

Nov 21, 2006

Hi,

i have a form that requires validation. i am using the following code:

Private Sub Form_BeforeUpdate(Cancel As Integer)

If IsNull(Me.number) Then
MsgBox "number is required", vbOKOnly
Cancel = True
Me.number.SetFocus
End If

i have repeated the above code for other fields.........

The problem i have is, if i click 'x' and before it allows me to exit, it brings up the validations, one by one (so annoying).

Is there any way THAT it can show all the validations at once??? in one message????

THANKS

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Validation

Nov 27, 2006

Is there a way to set up validation so that:

1: The system will not allow a car already hired, to be hired out again

I have a loans form, but i've noticed that, it lets me hire out any car, even cars that are already hired out.

any tips on how to set up the correct validation?

cheers guys

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Validation

Oct 3, 2004

How do make a validation rule where a statement is not allowed to appear more than 5 times?

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Need Help With Validation

Jan 16, 2005

hey....

wat would i enter as a validation check if i wanna
make sure that all the data entered has its first letter
ranging from only A to G....
i need help urgently ....
thanky

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Validation

May 15, 2005

hi all

The following code isn't working

If Me.txtScore > Me.txtMaxScore Then
MsgBox "Outside score range"
DoCmd.CancelEvent

I'm using an ADO unbound form to add records.

the txtMaxScores comes from a data table with its properties set as text. (I've tried using number but I can't get that working either)

The txtScore is an unbound text field. the user eneters a score and I'd like the above validation to trap incorrect scores. But there's something I'm missing. I've tried setting the txtScore properties to general number... no luck there either.

Any ideas are appreciated.

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Sql Validation Please

Jun 30, 2005

hola

what is wrong with this sql query?

SELECT id, state, datePart('yyyy', date) as 'year', datepart('mm', date) as 'month'
FROM availability
WHERE year = 2005
AND month = 6

using asp and ms access

cheers

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Validation Help

Feb 22, 2006

I have two seperate, but related questions. I have been searching for awhile now for an answer, but so far no luck. Seems like it should be fairly simple, but I guess I'm just more simple

#1
I'm trying to establish a validation rule when entering data in a query. The tables involved are:
Locks (Serial#, Comb#)
Joint (Locker#, Serial#)

The query displays the Joint table fields, at which point I enter (or change the #'s from a previous year) the serial numbers for each locker.

How can I make sure that the serial number that is entered is a valid number based on the Serial# column from the Locks table?
There are nearly 1000 locks in the database, so using a combo box is not an option.

#2
After the locks are assigned to lockers, I then have to go and assign people to the lockers. This is also done in a query which takes all its fields from one table. In this case, I would like to have a rule that would not allow me to enter a repeat number that has already been entered above it...basically not allowing me to assign the same locker twice.

Thanks in advance for any help!

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