Queries :: Checking Query For Null And Setting Operations
May 30, 2014
I have been working on an application where I am collecting survey data in a database. There are multiple survey tools available to the user, and it's possible to complete multiple survey tools in the survey.My problem is, it's possible for the surveyor to complete some tools on one day and other tools on another day. I am having problems with trying to figure out how to add a tool that has not been previously added and keep in the same survey which is all held under a single Survey Number.
The first step in the function is to set a Record Number temporary variable based on whether or not the tool has been used (it's possible to use multiple instances of a survey tool, so need to know if the Record Number is '1', or the next number in the sequence.I've been trying to do this by checking a query for a Null and setting the temporary variable using something like:
IF ISNull("RecordNumber","qryRecordHeader") Then '1'
Else
DLast("RecordNumber","qryRecordHeader") +1
End IF
The second half works just fine, so if there is a previous record, it will add. But if it's Null, it doesn't work.I'm trying to avoid opening a temporary form to run the query and checking a field. Is there a way around that?
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May 30, 2007
I am trying to build an email string and have been sucessful...although there are times when the Email Field in my table may not have a value....
Currently this creates an error....I am trying to test for Null and then SKIP that record if it is null and move on...
Any thoughts?
THe problem is that I can click the Msgbox that gives me the varialbe from strTo endlessly....I am stuck in the loop...it never gets to EOF???
It never even gets passed the first record it finds...
Something is messed up....
Anyone have any thoughts...
?????????????????????
' START CODE ==================================
Dim dbs As Database
Dim rs As DAO.Recordset
Set dbs = CurrentDb
Set rs = dbs.OpenRecordset("Select * From tbl_Groups", dbOpenDynaset)
Dim strTO As String
Dim EmailString As String
strTO = ""
EmailString = ""
Do Until rs.EOF
strTO = rs!Email
If strTO = "" Then
MsgBox "NOTHING"
Else
MsgBox strTO
End If
Loop
DoCmd.SendObject acSendNoObject, , , EmailString, , , "Subject Line", , True
' END CODE ====================================
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Oct 19, 2004
If I have about 9 Text fields, How would I go about checking to see if all of the text fields are empty, then hide all the fields, but if any of them have anything in it, show them all. Here is my code, but it doesn't work:
Code:If SpecAgent = "" And SpecArea = "" And SpecBenefit = "" And SpecCompany = "" And SpecCSR = "" And SpecDoctor = "" And SpecHospital = "" And SpecPlan = "" And SpecRx = "" ThentglNo = TruetglYes = FalselblSpecAgent.Visible = FalseSpecAgent.Visible = FalselblSpecArea.Visible = FalseSpecArea.Visible = FalselblSpecBenefit.Visible = FalseSpecBenefit.Visible = FalselblSpecCompany.Visible = FalseSpecCompany.Visible = FalselblSpecCSR.Visible = FalseSpecCSR.Visible = FalselblSpecDoctor.Visible = FalseSpecDoctor.Visible = FalselblSpecHospital.Visible = FalseSpecHospital.Visible = FalselblSpecPlan.Visible = FalseSpecPlan.Visible = FalselblSpecRx.Visible = FalseSpecRx.Visible = FalseElsetglNo = FalsetglYes = TruelblSpecAgent.Visible = TrueSpecAgent.Visible = TruelblSpecArea.Visible = TrueSpecArea.Visible = TruelblSpecBenefit.Visible = TrueSpecBenefit.Visible = TruelblSpecCompany.Visible = TrueSpecCompany.Visible = TruelblSpecCSR.Visible = TrueSpecCSR.Visible = TruelblSpecDoctor.Visible = TrueSpecDoctor.Visible = TruelblSpecHospital.Visible = TrueSpecHospital.Visible = TruelblSpecPlan.Visible = TrueSpecPlan.Visible = TruelblSpecRx.Visible = TrueSpecRx.Visible = TrueEnd IfEnd Sub
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Jul 10, 2014
The following code doesn't check null condition in Scannedby field. The scannedby has text data type. The code gives me all the data where scandate=20130722 but doesn't check that scanned by can't be blank.
Code:
rs.Open "select count(*) from BatchTBL2 where scandate=20130722 and scannedby <> null", cn, adOpenKeyset, adLockOptimistic
j = rs.fields(0).Value
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Oct 16, 2014
Me.Text11 = Nz(DAvg("[final whse-in diff]", "dbo_inventory", "[CAFETYPE]=" & Me.Text7 And "isnull(me.[DATE FIXED])=" & True And "isnull(me.DATE_IN)=" & True), 0)
I am getting a type mismatch error with this.
My question is:
1. is the syntax correct....
2. Is my way of checking for a value to be null correct....
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Aug 17, 2005
Hi all. I want to check for not null value constraint for all tables in database . I tried the following but when i run it i get the following error:
Compile error:
Invalid Next control variable reference
I be happy if some one one help me fix this error.if i remove the bold lines the program workes well but it does not put not null for table fileds that requries value.
picture of the output without the bold part
http://i5.photobucket.com/albums/y1...007/notnull.jpg
Code:Option Compare Database''This module displays field name and type in a massage boxFunction ShowFields(pTable As String) As StringDim db As DatabaseDim rs As RecordsetDim I As Integer''Dim j As IntegerDim n As Integer''Dim NL As StringDim strHold As String, ST As String''Dim x As Variant''NL = Chr(13) & Chr(10) ' Define newline.Set db = CurrentDbSet rs = db.OpenRecordset(pTable)n = rs.Fields.CountReDim x(n - 1, 1) As String'''ST = "Create Table " & pTable & vbCrLf''adding Create table and table name to statementST = "Create Table " & pTable & vbCrLf & "("For I = 0 To (n - 1)For Each fld In tbl.Fields ST = ST & rs.Fields(I).Name & " " & FieldType(rs.Fields(I).Type) & "," & vbCrLf If fld.Required = True Then ST = ST & " NOT NULL" & " " Else ST = ST End IfNext Irs.Closedb.CloseSet db = NothingShowFields = ST '' returns the fields name to main functionEnd Function
on click even code
Code: For Each T In db.TableDefs '''Skip the system tables If Left(T.Name, 4) <> "MSys" Then ''' this line determines the primary key of the table ''' by calling GetPk function from module pk = Left(GetPK(T, db), InStr(1, GetPK(T, db), "<-") - 1) cont = cont & ShowFields(T.Name) & vbCrLf & " primary key " & "(" & pk & ")" & vbCrLf & ")" & vbCrLf End If Next T ''' This line of code post the generated table statment to a massage box MsgBox cont
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Jan 10, 2014
So on a command button I have this code in the OnClick event. When I click the button it will ask me to enter the name if blank but if I enter something in that field and then delete the data is bypasses this. Does the same reason field, Why?
Code:
If IsNull(Me.CE) Then
MsgBox "Please enter your name"
Me.CE.SetFocus
Exit Sub
[Code] ....
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May 23, 2005
Please help, this error is wreking my head:
I have a VB APP updating a an Access DB, i get this error every so ofter:
-214 (load of numbers) Operation must use an updatable query.
I have given full control to to the directory on which the App and the Access sit..
any ideas?
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Dec 16, 2005
hi
i've joined two tables and have some null values .....
I want these null values to be 0 to be used in a calculation
anyone got any ideas how i could do this
cheers
Andy
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Jan 28, 2013
I have a form to enter attendance in that pulls students from a StudentEnrollmentTable based on FacultyName which is selected from a combobox that runs the following code:
Private Sub cboInstructorName_Click()
Me.Requery
End Sub
A query (StudentAttendanceBYFaculty) is run each time a faculty name is selected. On the form their is a field name TempClassesAttended which is bound to a field of the same name in the StudentEnrollmentTable. Teachers will enter attendance data and run an append query to append the current form records to the StudentAttendanceTable. Each time the form is repopulated the most recent TempClassesAttended values are pulled into the form. This is what is expected.
Now I want to load Null values into the TempAttendance field on the form each time the Faculty selects their name and runs the event. I looked at code online and it seems easy enough, but I don't know enough to make it work. This is the code suggested:
UPDATE TableName SET FieldName = Null
OR
UPDATE MyTable
SET MyField = Null
how to include this into the current event so that the event will return the faculty records with Null values in the TempAttendence field.
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Jan 21, 2015
I have the following simple variable assignment...
Dim PolRef As String
Let PolRef = Me.Policy_Ref_Num
But when I run my code I get "Invalid Use of Null" and PolRef is set to ""
This field is populated however, so I'm confused to why I cant set my variable to it.
If I don't use a variable and simply have let XXX = me.Me.Policy_Ref_Num then it still wont return the value from the field.
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Sep 15, 2013
I am new to access. I have created a report form a query and have fields with a value of "0" or "$0.00" I would like to set a static textbox to Null. I belive it can be done with the IFF function but I get a syntax error.
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Nov 15, 2014
Error 1: Setting Date Field in Recordset to null
Error 1: Setting Date Field in Recordset to null " data conversation error 3421 "
Solution: If the field is null set it back to itself .
Here is a simple dummy example i wrote to demonstrate the solution ( look for the bold text in side the code )
Code:
Sub Event_btnSaveEndTime ()
dim strEndDate as string
With Form_frmMainForm
strEndTime = .txtEndTime.Value
[code]....
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Jun 19, 2014
I have a crosstab query to summarise the counted string values from another query: E.g.;
TRANSFORM Count(Table1.Viable) AS CountOfViable
SELECT QryTable01.productName
FROM QryTable01
GROUP BY QryTable01.productName
PIVOT Table1.Viable;
As there are some null values returned (ie blank cell in the pivot table)
I used the Nz function to make this zero but when the query results are used in a report I want to add the rows to get row totals... but the result is as if they were string values;
So if I add a text box in the report with = [viable] + [Not viable]
t
Then the report row with the values:
Viable Not viable
14 12
displays as 1412
So how do I add the values in the rows???
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Feb 4, 2014
I've set up a form with a button to open a report based on the current name on the form. The idea is that as you look through the different pages on the form you can open a report for whatever one you're on and print it.
In my query I have a name field where I put the criteria: Forms!Formname.Textboxname
By clicking the button on my form I'm able to generate a report based on the name that appears in that textbox. It works great when I initially put it in but if I close the form (or query, or report) and open it back up it is blank.
Is this even possible with a text box? It seems like it when I open it, it has nothing to go off and that's why it's blank. I just don't know how to fix that.
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Mar 18, 2014
I need some syntax in setting 2 criterias for a DLookup query.
I've attached a sample db with 2 tables: Main & Timesheet
I need a "combo" query showing (on the same line) all Qty for Transcodes N, 1 & 2 where the Staff number and TSNum is the same.
I'm sure about the logic but the syntax is letting me down.
I can pull in 1 of the criteria E.g.:
OT1: DLookUp("Qty","ExOT1","[Staff] =" & [Staff])
But can for the life of me not script the second criteria in.
So in my result of ExCombo I'm getting Staff 11 showing 4 under OT1 while I know the result does not apply for TSNum 29832 as indicated hence the need for the 2nd criteria.
Since I have to change some of the values to text inside the query it might be best to have a look at the attached db rather than just suggesting the correct syntax .
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Sep 19, 2013
I have a simple query between two tables joined together by common fields. In my first table (Table 1 - tblLocations) I have information about a building i.e. Location Code, address and total sqft. . In my second table (Table 2 - tblAllocatedSpace), this contains details (Location Code, Room ID, SqFt assigned, etc.) of the space allocated in each building. The two tables are joined together when the “Location Code” in both table match.
In my query, I show the location detail from (Table 1 - tblLocations) and related records from (Table 2 - tblAllocatedSpace). My result looks like the following:
Location Code Sqft Address Assigned Sqft
106067 1,000 600 March Rd 10
106067 1,000 600 March Rd 15
106067 1,000 600 March Rd 12
106067 1,000 600 March Rd 20
The location code, Address and Sqft is rebated each time a space is assigned in (Table 2 – tblAllocatedSpace). When a build a report and need to sum the location Sqft, the number is multiplied by the number of related records in (Table 2 – tblAllocatedSpace). In this example by building total space is 4,000 sqft when I only it to show 1,000.
How do I set to only show the location code and sqft once?
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Nov 30, 2012
Access 2010..One organization that we work with provides us with a block of numbers for each of the two types of contract products we order from them; we do order non-contract stuff from them also.The block of numbers are the same (i.e. 20000 to 30000 this year) for each of the two products. This means that each product can have the number 20000, for example. We call this the Tracking Number. If it is one of these products, we need to select the Contract Number.
For all other one off orders we have with them, we assign our own Tracking Number starting with 00001. This Tracking Number cannot duplicate unless it is one of the aforementioned two products.Both the Tracking Number and Contract Number are in the same table. The user selects the Contract Number from a form (connected to the Contract Number table that has all the details on the contract) and the Contract Number is populated in the same table that has the Tracking Number.Each order must have a Tracking Number (no null)..Not all orders need a Contract Number (null okay).The Tracking Number and Contract Number combination cannot duplicate.I tried setting the primary keys to more than one field in the table, but they cannot have null values.
If not... I have been working on Plan B.... an AfterUpdate on the form (either the form or a field... don't know yet) that looks at a query that only has results if there are duplicate values.
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Jul 10, 2013
Ok so im working in MS Access 2007.
I want to create a query based on 3 combo boxes but have it so that if the field in the second or third combo box is not populated the query still runs.
Right now i have the Criteria set for the three columns that i wish to sort by as seen below.
Column 1
Criteria: [Forms]![Entity Selection Form]![areabox2]
Column 2
Criteria: [Forms]![Entity Selection Form]![devbox2]
Column 3
Criteria: [Forms]![Entity Selection Form]![entitybox2]
This gives me the correct query result but im forced to make a selection from each combo box. Is there a way to progamme it so that if I only make a selection from the first combobox and leave the others blank i can still get results in a query?
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Aug 16, 2007
I have a form which a user can select upto 3 different options to search the main database.
The main table has:
RVA Date
Council
Introducer
PS NO
Period
Asset Description
Current Cost
SSAP21
Position
The three fields the user can search on is:
Council
PS No.
Asset Description
I have created 3 individual queries to find the records for each of the above, as the other two choices could be left blank.
Not sure if one super query can be done to show the records based on the user input (as I say one or two choices could be left blank).
So far I have managed to get a main query (based on the 3 other queries) to work on all choices made by the user except Asset Description with the other two left blank.
I have made relationships between the three queries on the main query. Linking Council,PS No. & Asset Description to each other.
Almost there, just need the main query to work on the user selecting Asset Description only.....
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Mar 24, 2013
I am trying to do the good 'ol sales report (query) to include customers with no sales.
I have a customers table, account number table, sales table & sales (line) detail table. (all linked in that order)
If I run a query to show customers (in the customer table) with account numbers, that works
An unmatched query to show customer without an account number works (but of course the unmatched account number field isn't shown).
How can I get the two two be shown together with the "unmatched" having a null or 0 for their account number?
I am guessing in principle, the resulting solution can be modified to show customers without sales alongside those with sales?
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Jul 3, 2014
My parameters are linked to a form and say:
[Forms]![FormName]![Field] or [Forms]![FormName]![Field] Is Null
Ordinarily this works fine in returning either the selected value or all values if left null.
I need to pull in data from a Crosstab query, which means setting my parameter labels to [Forms]![FormName]![Field].
The problem is that setting the parameter labels is conflicting with pulling all records if the form dropdown is left null.
If I keep my parameters simple and just say [Forms]![FormName]![Field] then the query works with the crosstab data, but I can't do that. I need to show any records if the dropdown is left null.
The crosstab data isn't specifically the problem but needing to set the parameter names seems to be
I think I may have found a workaround by labeling the column headings in the crosstab, which means I don't have to assign parameter labels
It would still be good to know if there's a way of making it work with the parameter labels but this will do for now...
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Jul 29, 2013
I have a form that feeds information to a query which in turn sets up a report. For clarity i will list out in basic terms what I have
Input Form
- Check Box to activate/De-activate a text field [chk-active]
- Text field for a parameter [txt-Parameter]
the query has a column that has null values from the originating table. These values will be added a t a later date, but need to be queried and reported at some business intervals.
In the query criteria for this column, I have the following Criteria
Like IIF([Forms]![ReportGenerator]![chk-Active]=0, "*", [Forms]![ReportGenerator]![txt-Parameter])[/I][/I]
I have tried for the last 5 hours to figure out how to write the formula to be able to get the blank entries to show up as well but have had no luck.
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Jun 16, 2015
I have a form which users can toggle whether they want to only see entries that has data in a certain field. Previously I have set up a separate query with a hardcoded 'Is Not Null' in the criteria, and set the form to call the different queries based on the status of a toggle button. This time there is 22 queries that need to be modified so I'm hoping there's a better way.
I have a hidden textbox on my form that has value "Is Not Null" or Null based on the position of the toggle button.
In my query for the field criteria I have [Forms]![MainForm].[txtCriteria] where txtCriteria is the textbox previously mentioned.
When I run the query no data is shown.
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Oct 30, 2013
Database query. I need the query to count the records of a field and display a number for the records of the field. For instance, one field is [Genre] and the other is [Show]. The query needs to list the Genres along with the number of shows for each genre. I've been able to just use the query design and add the genre field and I can add the show field, use totals count which gives me the genre counts the number of shows. My problem is the null. Some genres don't have a show listed so the genre doesn't even show up in the result. If I could get the the genres that have null shows to result a 0 it would be perfect.
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Oct 2, 2014
My training database requires me to identify each training record in the tblEmpTrainHist table as either "Compliant" or "Delinquent". I thought a simple calculation in my query:
RecordStatus: IIF([DateReceived]<=[DateDue],"Compliant","Delinquent")
would do the trick. However, I did not consider the records where the employee has not yet completed the training and the field [DateReceived] is Null. There are two considerations: those employees who have no [DateReceived], but have not yet reached the DateDue (Compliant); and those employees who have exceeded the DateDue (Delinquent).
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