Delete Record Only If Child Records Don't Exist

Aug 6, 2005

Hi,

I'm trying to have a button on a form that would delete a record from a table only if there are no child records linked to it.

If there are child records for the selected record, the button would be disabled.

Is there a simple way of doing this?

TIA.

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Queries :: Query Multiple Records Between (Weeks) Where No Record In Child Table?

Jul 1, 2014

I am trying to determine the best method for how to handle this query using Access 2013. I have a clients table that contains the following:

clientID fName lName admissionDate dischargeDate
1 John Doe 05/06/2014 06/27/2014
2 Jane Doe 04/24/2014 05/15/2014
3 Steven Smith 05/15/2014 NULL/Empty
4 Chris Davis 06/12/2014 NULL/Empty

Then there is a WeeklyProgressNotes table that is there for the person that is responsible for auditing the clients charts. It does not contain the actual weeklyprogressnotes, it only contains a Yes/No field and a date field for the date the weeklyprogressnote was completed. Like below:

noteID completed dateCompleted clientID
1 yes 05/08/2014 1
2 yes 05/14/2014 1
3 yes 04/25/2014 2

I am creating a form that the auditor can open to determine what weeks she needs to check for each client to see if they have their weeklyprogressnotes completed that week. The weeks run Mon - Sun and there will be no record in the WeeklyProgressNotes table if she has not yet checked and confirmed for that week. So the form would basically look like this:

fName lName week completed date clientID(hidden)
John Doe 5/19/14-5/25/14 Checkbox Null 1
John Doe 5/26/14-6/1/14 Checkbox Null 1
John Doe 6/2/14-6/8/14 Checkbox Null 1
John Doe 6/9/14-6/15/14 Checkbox Null 1
John Doe 6/16/14-6/22/14 Checkbox Null 1
John Doe 6/23/14-6/29/14 Checkbox Null 1
Jane Doe 4/28/14-5/4/14 Checkbox Null 2
and so on.......

I have thought about creating an SQL statement to select all of the clients and then creating a function that determines their admission date within the specific week and their discharge date withing the specific week and then create a loop with another SQL statement with a BETWEEN clause for all the weeks and determine if there is an entry in the WeeklyProgressNotes table or not. If not then I would display out the above info. I'm not sure if there is an easier, less search intensive way of doing it. Maybe an SQL query that can cut done on some of the looping.

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Jun 28, 2013

When we browse through records in a subform we store the records in the database.When we want to delete a records for example the third record from the five records always the first records will be deleted. How can we delete the records where the cursor is at? When we are at the third record and press the delete button the third record from the list in the subform should be deleted.

Code:

Option Compare Database
Dim FocusBln As Boolean
Private Sub Identificeer()
Me.[Datum Aangemaakt].Visible = True
Me.[Datum Aangemaakt].SetFocus
If Me.[Datum Aangemaakt].Text = "" Then

[code]...

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Delete Record Deletes Other Records

May 11, 2006

I have something very bizarre happening that I cannot figure out.

I have a form with a subform on it. These are not linked. On the first form is one combo box, the records in the subform are requeried every time the combo box changes with the criteria for the subform based on the selection in the combo box.

I haven't got these linked because I also have an Edit option group selection on the main form which changes the subform from Data Entry = False and AllowAdditions = False to Data Entry = True and AllowAdditions = True. This allows me to use the form to enter new records or to edit existing ones by changing the edit mode.

I also have a delete button on this form with the generic code to delete a record:

DoCmd.DoMenuItem acFormBar, acEditMenu, 8, , acMenuVer70
DoCmd.DoMenuItem acFormBar, acEditMenu, 6, , acMenuVer70

The record source for this subform is a primary table on the one side of a one to many relationship.

When I am in the new record mode (Data Entry = True and AllowAdditions = True) and I delete the record I am currently entering it works as expected.

When I am in edit mode (Data Entry = False and AllowAdditions = False ) and I delete the record I am on. It deletes the record but any record in the many side (the secondary table with the foreign key) is also deleted as well. Now I'd expect it to delete the foreign key on the many side and wipe the field but this actually deletes the whole record the foreign key is in from the secondary table.

I have checked my relationship set up for these tables and they are fine:

One To Many Relationship
Referential Inegrity Checked
Cascade Update Records Checked
Cascade Delete Records Checked

I get the usual access warning telling me it is about to delete one record. usually you would also expect the warning to include the comment about this deletion will also delete any related records in other tables, but I don't get that.

I cannot for the life of me figure out why the whole record from the secondary table is being deleted and not just the related field.

Does anyone have any ideas?

I hope I have explained it properly. (Tis always hard to put into words a problem)

Thanks in advance,

Daz

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I followed the steps referred in page no. 67 & 68 in the Book "Microsoft Access 2007 Data Analysis" by Mr. Michel Alexender.

Customer Name
State
Product_Code
Product_Name
Price_perunit

TSI Engineering Indutries (P) Ltd.
Assam
P_05
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Kishan Krishi Engineering Works
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TSI Engineering Indutries (P) Ltd.
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Shri_Tata_Enterprises
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Expression code that it will display the msgbox if there's no record found.

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The code I'm currently using is...

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I'm using the following code to autofill the city and state on my form.
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If there is no matching record, I will:

1) inform the user with a msgbox
then if the user wants
2) open a form to add the record to the table


Dim rst As DAO.Recordset
Dim db As DAO.Database

Set db = CurrentDb
Set rst = db.OpenRecordset("tblZipcodes", dbOpenTable)



rst.MoveLast
rst.MoveFirst

Do Until rst.EOF

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Me.txtCoCity = rst![ZipCity]
Me.cboCoSt = rst![ZipState]

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How can I capture if there is no matching record in the table?

Thanks,

Sup

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I have set up a simplified event booking procedure, similar to the one generated by the access event manager wizard. It uses three tables, one with attendees details, one with the event details and abooking table that links the attendee ID with the Event ID.

The booking table uses commands similar to SELECT[Names + Contacts].[ID],[Names + Contacts].[Surname]FROM[Names + Contacts] to generate drop down lists of surnames and events so that the two can be matched together.

This works fine as a table.

However when placed into a form, whenever the form is opened I get an error message saying the record source specified on the form does not exist.

I have tried regenerating the form, etc. I have used a wizard to generate the form, closed the form, not changed anything in the database and then tried reopening it and I get the error message, can anyone shed any light?

Also if you accept the message then it knows how many records there are, so it must know there's something behind it, also if you change to design mode and then back to form mode, it finds all the data.

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Jun 21, 2005

Hello all

I had a query which was working fine to tell me the number of weekend bookings for holiday parks for a specified year:

SELECT Bookinfx.[Park Name], Month([Start Date]) AS FilterMonth, Year([Start Date]) AS FilterYear, Count(Bookinfx.[Park Name]) AS Bookings
FROM Bookinfx
GROUP BY Bookinfx.[Park Name], Month([Start Date]), Year([Start Date])
HAVING (((Year([Start Date]))=2005));

However it has become necessary to only find bookings of specific accommodation types so I modified it like so:

SELECT Bookinfx.[Park Name], Month([Start Date]) AS FilterMonth, Year([Start Date]) AS FilterYear, Count(Bookinfx.[Park Name]) AS Bookings
FROM Bookinfx
WHERE ((Bookinfx.Day)="FRI" Or (Bookinfx.Day)="SAT") And ((Bookinfx.Nights)<=3) And ((Bookingfx.[Accom Type])="CHALET/LODGE" Or (Bookinfx.[Accom Type])="STATIC VAN")
GROUP BY Bookinfx.[Park Name], Month([Start Date]), Year([Start Date])
HAVING (((Year([Start Date]))=2005));

Now when I run this, the first problem is that it asks me for the accommodation type, which is odd as I've already specified this in the query. The second problem is that if I enter say 'chalet/lodge' it returns records telling me that there are bookings for chalets and lodges at parks that only have camping! I have trawled through the database to make sure no erroneous records exist and so I know it is a problem with the query.

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SELECT MOC_EMERGENCY.[MOC NUMBER], MOC_EMERGENCY.PERMANENT_MOC, MOC_DATA.TITLE
FROM MOC_DATA INNER JOIN MOC_EMERGENCY
ON MOC_DATA.[MOC NUMBER] = MOC_EMERGENCY.[MOC NUMBER]

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Every time I enter an employee it creates a new blank event.

My query looks like:

Code:
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tblModules
--------
ModID
ModName

tblProcedures
----------
ProcID
ProcName

ModProcs
--------
ModProcID
ModID (FK)
ProcID (FK)

In a listbox I have a one or more modules selected and will construct the SQL in the AfterUpdate, presumably.

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Afternoon.

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