Random Row Selection Without Selecting Twice

Feb 27, 2012

I have below statement that select row from my table at random.

Code:
sql = "SELECT TOP 1 * FROM Question1to5table ORDER BY Rnd(-10000000*TimeValue(Now())*[id])"

How do make the row selection unique.

:::: maybe mark a selected row on the dataset, if possible how do i do that ::::

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Selecting Random Weeks Of The Year

Oct 19, 2007

Hello All

I have a number of Select queries that select 1st quarter up to 4th quarter of the year for accounting purposes. These are quite simple queries such as:

between "10" and "24" entered in the Criteria window. 10 and 24 being week numbers.

However if I wish to randomly select the week numbers after the query is loaded what is the correct code?

Regards
Terence
London

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Apr 2, 2006

Hi All,

Any ideas on how I do the following.

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I guess I am having to go the VBA route but dont have a clue on how to do it.

Cheers in anticipation.

Andy.

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Jan 18, 2006

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Dec 18, 2006

Hi all

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Jun 25, 2013

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Oct 27, 2014

I am designing a nomination form (web database so no vba macros can be used).

The form has 3 combo boxes: cboStaffName, cboLevel, cboNominee.

The form is bound to the tblSubmit table where the submissions are populated.

I used a select statement:SELECT Staff_List.Staff_Name FROM Staff_List; to populate the combo box for the Staff Name selection.

This is the select statement to populate the job level combobox:

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The select statement to populate the combobox for the nominee combobox:

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Sample of the database has been attached.

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Aug 10, 2005

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If the form is closed then reopened (db is not closed) the field will happily generate a random number each time the form is opened or if F9 is used.

I have tried Recalc in numerous events but each time it failed to work. It's late at night here so I'm hoping the morning will bring a clearer outlook???

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Jan 5, 2005

Was playing around, and when using the
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Aug 30, 2005

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Oct 4, 2005

Hi, I have a DB that is basically a big electronic form. Each table is a section of the form and the main central table stores the ID's from the other tables. Most of the relationships are one to one but without referential integrity because sometimes sections need to be skipped.

It's been growing fairly rapidly lately as bit's keep getting added but now a weird deletion problem has started appearing. Every once in a while when a user goes to complete the form (right at the end) it suddenly dissapears. The records in the related "section" tables are still there but the main table storing all the ID's loses the record.

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If it happens the same user can input exactly the same data in exactly the same way and it saves it fine.

It really is random!

People are starting to get really frustrated. I was tring to "sell" the idea to a new department as well and had 15 people sitting in front of a projector when it happened to me. I was mortified :eek:

Any ideas would be greatly appreciated.

thanks,

Tom

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Feb 11, 2008

Hi,

everything was going fine until a random error appeared and now wont go away.

here is my code

MainFormPay()

Dim stDocName As String
Dim stLinkCriteria As String

stDocName = " Payment Numbers" ' name of form t open
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stLinkCriteria = "[ContractorID]=" & me.ContractorID ' filter to contractorID
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end sub

this was working fine but now i get the following error message:

Run-time error '40036'
Method 'Item' of object 'Forms' failed

when i debug, it highlights the line
Forms![Payment Numbers]![VerificationID].Value = ANumber

the purpose is to get the LastOfVerificationID value from form 1 and then open Payment Numbers, create a new payment number, set verificationID to the new value. this was working fine and without even woring on the forms code, this error has arisen.

how can i fix it?


Nigel

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May 1, 2006

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Apr 7, 2008

Hello,

I have a very complex issue.

First of all there is a table called "tblParTeam" wich contain the teamname and ID of teams partissepating in a certain Tournament. The tournemant data is kept in the table tblTournament.

Each tournament contains a couple of variables: "Number of teams per tournament", "Number of Rounds" wich reside in the tblTournament.

Here is the thing. I also have a form based on the tblTournament. Each tournament had a number of partisipating teams (stored in the variable "Number of teams per tournament"). Then I have a table called tblTournamentDetail wich containt the Tournament_ID, TeamPro_ID (looks in the table "tblParTeam"), TeamContra (also looks in "tblParTeam").

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Lets say I have 10 teams I want 5 to be filled in randomly in the TeamPro_ID and 5 in the TeamContra_ID.
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Thanks in advance.

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Jun 20, 2005

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Feb 20, 2006

Hi Guys,

I hope someone can help with this. I have a table, "Blasthole Submission" which is populated by input in a form, using the code below:


Const MyTable As String = "Blasthole Submission"
Const MyField As String = "Sample Name"
Dim db As DAO.Database
Dim rs As DAO.Recordset
Dim intCounter As Double
Set db = CurrentDb
Set rs = db.OpenRecordset(MyTable)
For intCounter = Me.txtStartValue To Me.txtEndValue
rs.AddNew
rs.Fields(MyField) = "TP" & intCounter
rs.Fields("Submission #") = Me.SubNum
rs.Fields("Sample Type") = "Blasthole"
rs.Fields("XRF") = "True"
rs.Fields("LOI") = "True"
rs.Update
Next intCounter
rs.Close
db.Close
Set rs = Nothing
Set db = Nothing


What I am hoping to do is to place a random duplicate in the table, called, for example TP111152 DUP, approximately every 50th record. Is there any easy way of doing this?

Thanks in advance for your help!

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Hi Guys,

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Jan 21, 2008

Hello all

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I need help with this problem:

I have to work on this mdb that has been imported from Access 2000 to Access 2003. The guys did it some months ago, and of course they deleted the old .mdb and there are no backups.
However, the db still works, except that the ID of some tables are now "random id" than "incremental id", and since they used it for some months, now they are full of new records with random IDs.
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Hi all,

I am not real sure whether or not this can be done with a query, but here goes.
I have a query randomly selecting the top 6 from a selected group.

SELECT TOP 6 tblConsortium.ContactID, tblConsortium.RandomID, patients.LastName & ", " & Patients.Firstname AS [Employee Name], Contacts.Company AS [Company Name]
FROM patients INNER JOIN (Contacts INNER JOIN tblConsortium ON Contacts.ContactID=tblConsortium.ContactID) ON patients.PatientID=tblConsortium.PatientID
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What I would like to do now is: The randomly selected Employees need to have a randomly selected TEST. There are only 3-Test to choose from. I have placed the TESTS in a separate table and entered 20 of TEST1, 4 of TEST2, and 1 of TEST3. I then set a query randomly shuffling these items. I need these TESTS to randomly be assigned to the randomly selected Employees above.

I would greatly appreciate any thoughts or help…
Thanks Enviva

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Hi,

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If Random value is around 0.9-1, the status value is 0

Here's my Query :

UPDATE DB Set Random = RND()

Rnd() give random value, but each records have the same value,
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