I do not understand what is happening here. I have foll0wing line in a calculated query field:
m: Switch([EmpID]<5,1) ' run Query 18 in attached example, A2007/2010
this produces 1 for all EmpID<5 and Null for all other EmpID's. All as expected.
But if I do this:
m: Switch([EmpID]<5,1,[EmpID]>=5,Null) ' run Query 19 in attached example
then the entire column is set to Null
It might be an easy one but I just wasted the past hour deciphering through my code in order to solve the run-time error '94' that I'm getting when trying to execute the following code:
Code:
Private Sub cmdUpdateDates_Click()
'###################################
'This sub aims at combining the timesheet date and the start and end time into the fields [Start Time] and [End Time].
'###################################
Dim intCounter As Integer
intCounter = 0
Dim rs As ADODB.Recordset
[Code] ....
I have a form with couple of textboxes bound to a table. When the user opens the form to enter records, i want to write a function that would go through the textboxes to check whether the textboxes are left NULL. Now i can write code on button click for each form, but i was wondering if its possible to write a function that could be called for each form that i have to check for null values.
View 7 Replies View RelatedI am struggling trying to execute a function inside a Form_current event to display some stats.
The Function is this:
Code:
Function FlightsByAircraft(Aircraft As Long) As Long
Dim rst As DAO.Recordset
Dim dbs As DAO.Database
Dim str As String
str = "SELECT * FROM tblFlights WHERE AircraftID = " & Aircraft
[Code] ....
The code for the Form_Current event is this:
Private Sub Form_Current()
txtStats1 = FlightsByAircraft(Me.AircraftID)
Very simple. Well, the problem is when I move to a new record, a error message comes up: "Run-time error '94' - Invalid use of Null". It is because the AircraftID is not populated at that time. I tried to insert in the function code something like that:
Code:
If IsNull(Aircraft) then
exit function
else
.... (the DAO.Recordset code)
but it doesn't work.
Hi!
I want to be able to filter a form based on a dropdown box, where one of the items can be null. (The field is of type short date).
the dropdown box is named "Fltr1".
The form is based on a query, and i have tried to express the filter in the query like this (sql syntax):
([Tablename].[Columnname]) Like "*" & [Forms]![frmMyForm]![Fltr1])
But this way, the records with this column being null are omitted...
I very much appreciate any help that leads me in the right direction ;)
thanks
Okay so I have a column called 'totalincome' on TblCashflow. There are 60 records of TotalIncome (represents 5 years or 60 months) per asset that I have on another table, TblLoanGeneral.
What I need to return is the LAST value from totalincome that is not null. For example, we may only have entries in the 60 records that go to row #35, or 50 or whatever. When I use the Last criteria it gives me the 60th record (in example would give me a 0), and when I use the Max criteria, it gives me the largest income value regardless of location(would be 50,000 in example). What I need is really where the "last" income amt is >1 (20) however, when you set last, it only considers row 60.In the example below I would want 20 to be returned.
ID
Row#
TotalIncome
1
1
1000
1
2
2500
1
3
50000
1
4
20
1
5
0
1
6
0
1
7
0
Hi all!
I have a query that returns some fields with "#Error" ...
The reason is that I call a function in the query, and the function chokes if there are no matches in my query criteria and therefore no argument is sent to the function.
I tried putting this in the function:
var = Iif(IsNull(var) = True, 0, var)
-but I still get "#Error" when there are no matching records.
I presume this is because not even Null is given to the function as an arg.
Should I make the arg optional or how can I solve this??
Thanks :)
I have 1 query that connects 4 of my tables through a tracking number. I am trying to make it so the value (DStatus) from DTable will populate where a (DStatus) is provided, but where there is no (DStatus) the column is filled in with a (SStatus) from STable. There is always a SStatus for each tracking number, but not always a DStatus, where there is a DStatus, it is more accurate.
Can I do this all in 1 query, whether I have to make a new column within my query for this to work, whether I need to have my query output into a table first.
Is there something I could type into the Criteria field of my query.
I have tried using Nz([DStatus],[SStatus]), an Iif Statement, the IsNull function, etc with no avail.
I am trying to using an iif statement to pick up null values, but I don't know what to type in the function. I tried using "is null", but got an invalid message.
What value I should type in to get null value in the function below?
IIf([popi_r2a] is null","",[popi_r2a])
I have a table in which i want a column name as output when the data in it is null.
View 2 Replies View RelatedThis is the function i'm using for summing a listbox column:
Function TonSum() As Variant
Dim I As Integer, J As Integer, ctl As Control
Set ctl = Me.lstDrivera2
J = ctl.ListCount - 1
[code]...
The problem i have is if one the records in the listbox doesn't have a value (is null) then Access gives me a 'Type Mismatch' error. How to treat the null value so it excludes it from the sum?
I have created by external data from excel, while one of the column values are showing blank.
How can i find the column having null or values in table.
Error : Type Conversion Failure (ImportError table)
Query :
Code:
SELECT * From empdetail
WHERE EmpId =IsNull ("")
From the above query, not getting the result
Hello all,
A bit of a weird one, I've got a query and the criteria for showing records is that one particular field is null. However the query is showing records with the values in the field chosen for the Is Null.
Not sure why this is happening, has anyone come across this problem before?
Thanks.
I've been trying to populate a field in a form with information, but only if the field is blank.
What I am trying to do is this.
I have a continuous form displaying all of our principals, however when our principals are on leave I want to populate the field with the "acting principal". I have set it up so the field grabs the acting principal first but it is blank for several schools. For these schools where there there is no "acting principal" I want it to grab the substantive principal automatically and populate the field.
I have tried Is Null, Is Not Null, NZ, IF, Where and Then statements but to no avail.
I have a calculated field (Bhours) with the following IIf function:
=IIf(Fields!BDate.Value<=Parameters!Pdate.Value and Fields!EDate.Value>Parameters!Pdate.Value,Fields!H ours.Value,0)
It works perfectly, but I don't like the fact that it has a zero for the false part as I like the field to the blanc instead of filled with a zero.I can't use a space as I need to calculate with this field later on. I tried using "", but then the field displays #error".
Hi friends,
I am new to this forum, and I am facing a problem while learning MS-Access.
I am preparing a database that stores the marks obtained by students in a particular paper in addition to their particulars in tables.
A query is then generated to canculate the aggregate marks and result (Pass/Fail) for the student. It is then presented in a report fomatted as a marksheet, as well as one tabulation chart.
The database is very crude in format, but I am happy with it since I do not know programming at all, and still I could make it.
I have used in built menu of "ms-access" and mouse clicks only for generating query. It was a learn by doing method.
The problem is that my marksheets require absent students to be marked as "ABSENT" or something of that kind. If I convert my Null values to :
Expr2: IIf(IsNull([E_1]),"ABSENT",[E_1])
It shows ABSENT for null value, but refuses to make column total for E_1; On the other hand if I do not enter such expression, it makes column total in tabulation report, but fails to mark "ABSENT" to those who did not appear. So I have to lose one thing to gain another, while I need both.
Can anybody help me at this?
pc
I am having problems with setting up a set of combo boxes.
What I am trying to do is if combo Productline is empty then in combo PartNumber would show all products but if combo Productline has a value selected then in the combo partnumber would only be able to select the partnumbers in that productline.
Hi, I have some problem with assigmnet with date and string variable. what i wana do is get data from Forms textboxes into variable and then by insert query send to history table.
the problem occurs when there is blank textbox its says invalid use of null.
e.g
myStringVariable = Forms!myform!EmpName
myDateVariable = Forms!myform!EmpDOB
this code is behind the update button which i press when ever i want to shift data to History table
so when the fields are empty the invalid use of null error arrise
any idea how to handle this null specially in date
I think the title pretty much sums it up....
I have a query where data is first sorted by user input; first field's criteria: [fieldname], then by another field's criteria: Is Null.
I know there are records containing null values in the second field, as I have run a select query with the criteria: Like "*", to make sure they are null, and not zero-length-strings.
The query is refusing to return any results...
Any ideas?
Is there a code that will replace the empty fields by shifting the bottom fields up for access? I am planning to write a code that will delete unnecessary items in my database, however, that will cause the database to have "holes" in it.
View 4 Replies View RelatedI'd like to put a WHERE clause where I confont the date in an unbound textbox with the date in the table. In vba I control the null case of the unbound textbox, but I'm not sure how to control the null value in the sql code.here is the code "strDataRiferiment" that I later insert in a concatenated SQL code. The rest of the code works, while this line doesn't. The problem are the null date records present in the table COMMESSE.What I'd like is a WHERE clause that:
- returns records with all null date values and
- returns records with not null values where these dates are < date chosen in the unbound textbox
Code:
Select Case Nz(Me.InizioDataRif.Value, "Null") 'the unbound textbox
Case "Null"
strDataRiferimento = "AND (([if is not null] COMMESSE.DataChiusura =< #" & Format(Me.FineDataRif, "mm/dd/yyyy") & "#) OR (COMMESSE.DataChiusura IS NULL)) "
Case 'etc
'etc..
end select
I tried for example:
Code:
"AND ( IFF ((COMMESSE.DataChiusura,0) IS NOT NULL,
(COMMESSE.DataChiusura,0) =< #" & Format(Me.FineDataRif, "mm/dd/yyyy") & "#) , (COMMESSE.DataChiusura) IS NULL) )) "
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.
Windows vista
Access 2007
I can't seem to figure out how to test a combo box null value.I try:
Code:
If IsNull(Me.cboManufacturer) Then
MsgBox ("Please select category")
Else
DoCmd.OpenReport "rptItemCategory", acViewPreview
End If
This works if the combo box IS NOT NULL, but if null it gives me:
PHP Code:
Run-time error '3071': This expression is typed incorrectly, or it is too complex to be evaluated.
For example, a numeric expression may contain too many complicated elements.
Try simplifying the expression by assigning parts of the expression to variables.
I then tried:
Code:
If IsNull(Me.cboManufacturer.Column(0)) Then
MsgBox ("Please select category")
Else
DoCmd.OpenReport "rptItemCategory", acViewPreview
End If
This works if the combo box IS NULL but if i've made a selection, it still gives me the message box as if I've selected nothing....
How to resolve error 94 in the following code:
Private Sub Form_Current()
Dim strTime As String
Dim strHour As String
Dim strMinute As String
If (CollectionTime.Value) = "" Then
MsgBox CollectionTime
[Code] .....
I am trying to run this code but getting a run time error 94 - null value - when it shouldn't be.I am thinking I have written the Dlookup incorrectly?
Code:
Private Sub txtProductName_Click()
Dim iProdType As Integer
Dim ProductID As Integer
iProdType = DLookup("ProductTypeID", "tblProduct", "ProductID" = Forms![frmBooking]![cboProductID].[Value])
Note ProductID in an integer
How can I diagnose this or what could the solution be?
I am using a frame on form to get report. Below is the code used to filter report.
Select Case Me.fraReportType.Value
Case 1
strReportType = "Like '*'"
Case 2
strReportType = " Is Null"
Case 3
strReportType = " Is Not Null"
End Select
The second and Third case is working fine. While the first condition is not working. This filter is on date field. There are three possibilities:
1. If we need all data
2. If we need is null data
3. If we need is not null data
How I can get the first condition using my code mentioned above.