Modules & VBA :: Using DCount To Validate Multiple Fields?
Apr 15, 2014
I am having an issue using DCount to validate against 3 fields within my database. I have a booking form which contains a Staff member, viewing slot, and Viewing Date which is used to book property viewings.
I want the form to check that the booking doesn't already exist when the process booking button is pressed.
I am using the following statement:
Code:
If DCount("*", "Viewing", "[Staff_ID]=" & Me.[Staff_ID] & " AND [Viewing_Period] = " & Me.Viewing_Period & "' AND Viewing_Date = '" & Me.Viewing_Date) & "'" > 0 Then
MsgBox "Cannot book, booking already exists", vbCritical
End If
I always get the error "Syntax Error (Missing Operator)".
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Jul 14, 2014
I need to check the combination of a text box and a combo box that are bound to the same table for duplicates and then give a message box telling of the existing records. The 2 fields are set up as a compound index so access displays a generic message but I am trying to customize the message without doing it through error trapping (because I want it earlier in the processes on the form).
I am trying to us Dcount as follows but this is not working. It seems to be checking for either rather than a combination of the 2 fields because I get my message if either the Description OR the Group is duplicated (both of the text box and the combo box can have duplicates and it is only the combination that is singular) .
If DCount("[Description]", "[ItemTBL]", "[Description] = '" & Description & "'")
And DCount("[Group]", "[ItemTBL]", "[Group] = '" & Group & "'") > 0 Then
MsgBox "This Item is already in the database.", vbExclamation, "Already in Database"
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Apr 14, 2014
I created a query in Query Builder which contains a DCount with multiple parameters and it runs as it should. I am trying to convert it to VBA, but my inability to put in the quotations marks correctly is frustrating me terribly.
Here is the SQL version from Query Builder:
UPDATE [Daily Status Update Table] SET [Daily Status Update Table].NumberOfChases = DCount("[ChaseOtherID5]","[Chases_View_ALL - TX_Mbr 9 Digit]","[ChaseOtherID5] = 'U - Initial Contact' AND [ChaseStatus] = 'A'"), [Daily Status Update Table].ChaseStatus = "A", [Daily Status Update Table].NewStatus = "A", [Daily Status Update Table].ChaseAssignment2 = "Unscheduled"
WHERE ((([Daily Status Update Table].ChaseOtherID5)="U - Initial Contact"));
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Jul 19, 2015
The following code is giving me a "Run-Time error '13' Type mismatch. I have tried isolating both criteria and they seem to be fine but joined together with "AND" they error. Workdate is a Shortdate. Flightnumber and flightID are numbers. FlightID source is a cmb within my form.
Private Sub FlightID_BeforeUpdate(Cancel As Integer)
If DCount("[WorkDate]", "Main_tbl", "[WorkDate]= #" & Me.WorkDate & "#" And "[FlightNumber] =" & Me.FlightID.Column(0)) > 0 Then
Do this....
End If
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Oct 28, 2013
A small issue I was wondering of for a few day . Is it possible in SQL query to SELECT multiple fields from multiple tables ? Example for the question is
Code:
dim my_var as String
my_var = "SELECT Emp_FName , Emp_LName , Emp_Adress " _
& " FROM Table1 " _
& " AND Emp_Date_Of_Payment , Emp_Sum_Of_Payment " _
& "FROM Table2 " _
& " WHERE Emp_ID = 3 "
Is this code actually valid in SQL gramatics , and is it usable if passed to a Recordset variable ( rs = CurrentDB.OpenRecordset(my_var) ) ? Just FYI - The two tables are not related and I want to keep them that way (If possible relate their records just via SQL/Vba )
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Apr 13, 2014
I am trying to validate that the user selects at least one checkbox out of three on the form in Access 2010. They can select one, two or even all three if they wish, but at least one must be checked. I am using the following code attached to the click event of a command button. It was fine but seems to have stopped working. The control names are generic to illustrate my code. The form is unbound:
if (chk1 + chk2 + chk3) = 0 then
Msgbox "Please select at least one checkbox"
exit sub
end if
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Aug 5, 2014
I have a textbox where I need an afterupdate event, which should check that input is 3 letters followed by 3 numbers. The total is 6 characters, but always 3 letters + 3 numbers. If condition not met, a msgbox will be shown, for the user to input correctly, before being able to continue.
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Jan 20, 2014
I would like to ask how can i validate the username and password in a textbox? I have a frmLogin and frmMain.
I have also a table called 'tblUsers' with column fields 'username and password'.
If username is not found in database then a msgbox will prompt 'Username is not yet created'.
If username is okay and password is incorrect then msgbox will prompt 'Incorrect password'
If username and password is okay, then a msgbox will prompt 'Successfully login' and will continue to frmMain.
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Nov 27, 2014
I have a table called 'Klanten' which contains the rows 'password' and 'login' (and several rows not needed for this form)
So I'm trying to make a login form which first checks if something is entered (this part of the code seems to work).
Private Sub Knop13_Click()
'Check to see if data is entered into Username
If IsNull(Me.Username) Or Me.Username = "" Then
MsgBox "gelieve een login in te voeren.", vbOKOnly, "Required Data"
Me.Username.SetFocus
[Code] ....
But from then on i seem to have some issues.. The part of the code underneath seems to only work for the first 'login' and 'paswoord' in my table called "Klanten".
-Username is the name for the field where they enter their 'login'.
-Password is the name for the field where they enter their 'paswoord'
If Username.Value <> DLookup("[login]", "Klanten", "[Username]='" & Username & "'") Then
MsgBox "Invalid Username. Please try again.", vbOKOnly, "Invalid Entry!"
Exit Sub
End If
If Password.Value <> DLookup("[wachtwoord]", "Klanten", "[Password]='" & Password & "'") Then
MsgBox "Invalid Password. Please try again.", vbOKOnly, "Invalid Entry!"
Exit Sub
End If
Then as last part i would like to goto another form called 'Mainmenu' if both the Login and the Paswoord is correctly entered in the fields Username and Password. Here i have the most issues as this doesn't seem to do anything at the moment
If Password.Value = DLookup("[wachtwoord]", "Klanten", "[Username]='" & Username & "'") And Username.Value <> DLookup("[login]", "Klanten", "[Password]='" & Password & "'") Then DoCmd.OpenForm "Mainmenu"
End Sub
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Feb 11, 2014
I am trying to write following code, I want Msg to pop, when all three condition are true, but it not working
'''Non Budgeted Projects need Explanation and Variance class"
If Me.ID.Value >= 90000 And and Me.Variance_Class = "" and Me.Comments_Explanation_Delta_____100K = "" Then
MsgBox "This project is Unbudgeted. Please Add 'Variance Class' and provide Explanation why this project is Unbudgeted project has been added.", vbExclamation, "Rules Checker..."
CheckRules = False
GoTo Exit_CheckRules
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Jan 20, 2014
I'm new to access vba and I'm trying to create a login form. I have already my code to login but i want to validate the password in 'case sensitive' basis. Below is only what I've got so far.
Code:
Private Sub cmdLogin_Click() Dim login_validation As Variant login_validation = DLookup("Password", "tblLogin", "Username='" & Nz(txtUsername.Value, "") & "'") If Nz(login_validation, "") <> Nz([txtPassword].Value, "") Then MsgBox "Incorrect Password. Please try again." txtUsername.Value = "" txtPassword.Value = "" txtUsername.SetFocus Else MsgBox "Hi " & txtUsername.Value & "," & vbNewLine & vbNewLine & "you have successfully login!" DoCmd.OpenForm "frmMain" End If End Sub
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Dec 24, 2013
I am trying to pass a date field from a Form and check if this date already exists within a table if so run this macro.
This is what I have so far...
Private Sub Command38_Click()
If DCount("*", "TblDietPlan", "[MealDate] = <> txtCusDate Then
stDocName = "McrPrint_LabelsWklyCR"
DoCmd.RunMacro stDocName
[Code] ....
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May 16, 2005
Not sure if this belonged in reports or queries, so I chose general. I have looked at several DCount threads but haven't quite found my answer. I want to use Dcount in an unbound textbox in a report. It counts the number of records in another table - comparison
the first part of the statement works fine ( up to 'iss'"). When i added the between date part i'm not getting any # returned in my report. I want to addthe criteria of RecDate between the 2 dates on the open form.
Can anyone tell me where my problem lies? ( if this makes sense)
Thanks
Kevin
=DCount("[type]","comparison","[type] Like 'iss*'" And ("[comparison].[RecDate]" Between Forms!DateInputforRMAsReturned!Text0 And Forms!DateInputforRMAsReturned!Text2))
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Aug 7, 2006
Hi Folks
I have a text box which shows the following
=DCount("[Ref number]","main","[open or clsoed] = 'open'")
This looks at a table with a primary Key called Ref Number in a table called main with a field called open or clsoed and looks for the value open only.
I need to specify another fileld, called engineer wheer I match the username =jimmy
Im struggling to add this extra field
So it wiill look , for Open and an engineer called Jimmy in a table called main that has a primary key set !
Can anyone give me some pointers on this simple question ?
Br
Jimmy
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Jan 3, 2005
Good day:
Code:
=DCount("[DEPARTMENT]","[Query1]","[DEPARTMENT]='ENGINEERING'
I have a query with these fields: DIVISION, DEPARTMENT.
The DIVISION fields are populated with undergrad or grad. The DEPARTMENT fields are populated with ENGINEERING.
I wish to count the occurances of undergrad engineering and count the occurances of grad engineering and return the values in separate text boxes.
Any ideas on how to count occurances of TWO fields?
Thanking in advance.
Dee
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Apr 19, 2014
With a form with two fields one is a date field formatted as short date and the other is a lookup combo box that I use to lookup predefined times and is formatted as short time. The date and time are stored in the same table as date/time in separate fields. I attempted to use Dcount, and get syntax error missing operator. Below is one of a hundred that i have tried after scouring this forum and the net. I ended up converting the Appt_Time field to a text field in the table to eliminate one date field but still got no where.
Code:
Private Sub Appt_Time_BeforeUpdate(Cancel As Integer)
'Check table for duplicate
If DCount("[Appt_Time]", "tblexams", "Appt_Time= & Appt_Time & And [Sch_Date] = #" & Sch_Date & "#") > 0 Then
'Message box warning of duplication
[Code] ....
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Aug 7, 2013
I want to incorporate a button that locks a certain portion of my form but my form is still quite long...
Is there a way which I can lock multiple fields at once or do i have to do:
Code:
Field1.Enabled = False
Field2.Enabled = False
Field3.Enabled = False
Field4.Enabled = False
and so on...
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Aug 16, 2013
I have a form with mandatory fields highlighted a different colour (yellow or blue). On the form are 3 tab pages with subforms which also have these fields.
I have added a checkbox named incomplete to each tab page and to the form. My intention is to try to write some code to look at each field on the page and if the non-white (ie mandatory) fields all have a value, then the incomplete on that page is changed to no. The code then checks the incomplete value for all 3 pages - if these are all no and the form's mandatory fields are also filled in, then this also becomes no.
When creating reports, I can then find out which records have not been completed and notify the relevant staff. Also if the data is incomplete, they don't want those records appearing in reports - so I can use the incomplete value from the form.
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Sep 2, 2013
I want a search box on my db that will locate data from certain fields within my database. Today i came across the posting by John Big Booty with the above title and what he has done is exactly what i require.
Now i have followed all instructions to the letter however i keep getting an error which i have attached ......
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Aug 10, 2015
I'm trying to create a query that has a calculated field that shows a maximum value from multiple fields.
As far as I can find, this is not built into Access, so I've used this code from a Microsoft page:
Code:
Function Maximum(ParamArray FieldArray() As Variant)
' Declare the two local variables.
Dim I As Integer
Dim currentVal As Variant
' Set the variable currentVal equal to the array of values.
[code]....
The problem I'm having is, well this doesn't work for me.I'm a bit of an beginner VBA coder, but I understand this code and don't know why it won't work.It only displays the value from the field within the brackets.The values used are Dates, so I need to display the latest date from multiple fields.
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Oct 7, 2013
I am wondering if there is an efficient way to compare two fields from one table to another two fields from another table. So basically
Code:
If targetTable.Field1.Value = sourceTable.Field1.Value And targetTable.Field2.Value = sourceTable.Field2.Value Then
targetTable.Field3.Value = sourceTable.Field3.Value
The problem is that I need to run this for all entries in targetTable. The only I could think of was to use 2 nested for loops (one for target table and one for source table) as outlined in the following (my data is currently in Excel, but I want to import it to Access)
Code:
For i = 2 To 5754
For j = 2 To 3500
If targetSheet.Range("I" & i).Value = sourceSheet.Range("AR" & j).Value And targetSheet.Range("K" & i).Value = sourceSheet.Range("AS" & j).Value Then
targetSheet.Range("I" & i).Value = sourceSheet.Range("AT" & j).Value
The above code works but it is really slow (takes about 12 mins on a high-end CPU).
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Sep 3, 2013
I have an access table that looks like the below:
"field1", "field2, field3, field4, field5, field6, field7"
"field1~field2~field3~field4~field5~field6~fie ld7"
"field1~field2~field3~field4~field5~field6~fie ld7"
"field1~field2~field3~field4~field5~field6~fie ld7"
"field1", "field2, field3, field4, field5, field6, field7"
"field1~field2~field3~field4~field5~field6~fie ld7"
I've got a module which loads the data into a table, but it can't handle the records that are ~ delimited, so spits them out as a single field.
I know there is some VBA code that can be used to split comma delimited records, and I've seen bits of it floating around online and tried to alter it to work for the ~, but I get the feeling that what I've seen is only a part of the required code, how to put it all together to make something that actually works.
So, what I need to do is;
- Split some records in a table out into multiple fields where there is a ~ present
- Place these newly split fields into a table (I don't mind if it ends up in a new table or not)
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Oct 15, 2013
How to prevent duplicates on the combination of two fields - text & numeric?
I'm currently using the code below that warns users when the combination of two fields have already been used. (Combination of the TWO fields has to always be unique so if used again will warn the user)
Works well when both fields are numeric but fails when the JobDetails field is changed to text in the main table (tblPPMPLanner)
Code:
Option Compare Database
Option Explicit
Private Function IsDuplicateRecord() As Boolean
On Error Resume Next
Dim PreviousRecordID As Long
IsDuplicateRecord = False
[Code] ....
The field that should be a text field is called "JobDetails"
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Jul 29, 2013
Can I look up and verify data on a "second" form based on a selected record from first (still open) form.
I am trying to allow users to select a User Name from a combo box list and then open "Change Password" form when they select "Change Password" for that selected user name.
My problem is that I can't figure out how to associate and verify the data tied to the user name selected on the previous (Login) form ( I am trying to validate the old password tied to that selected record).
I have the first login form created, and it's working just fine. I also have the change password form created (and it's displaying the user name selected from the first form using:
Code:
Private Sub Form_Load()
With Forms![frmLogin]![cboUserName]
Me.txtPwdChgUserID = .Column(2, .ListIndex)
End With
EndSub
I also have the code written to validate and confirm old password, new password and validate new password (when the save button is clicked). I have yet to update the password with the new password (still trying to figure that out).
Attached zip file has screen shots of the two forms.
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Jul 11, 2015
Im a relative novice with access VBA, and I'm really struggling with using Dcount with date variable. All I want to do is count if a certain date appears in a table. Here is the extract from my code:
Dim WorkoutDate as Date
Dim datecount as integer
datecount = DCount("[WorkOut Date]", "tblworkoutlogs", "[workout date]= " & WorkoutDate)
Whatever dates are in tblworkoutlogs, datecount is still = 0...I've trawled the net and tried many variations of the code but no success!if I change all the date formats to strings in the code and the tables, it works so I know i'm looking in the correct place.
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Jun 8, 2015
Upgraded from Access 2003 to Access 2010. My DCount query was working fine in Access 2003 for many years but now I am having issues. Everything is written in VBA.
Routine:
1.) Insert records into table tblEmployee
2.) Query table tblEmployee to count how many employees are in each department using DCount.
Issue:
DCount returns 0 for all Departments.
Findings:
If I manually open table tblEmployee and edit an employees department (I actually named it the same department), DCount will then find 1 person in that department (the record I manually edited). It seems a manually edited record will be counted but anything written by the insert query is ignored.
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