I have a webpage which shows some results upon executing some SQL statements. However, i will met with some problems when the SQL statements return a NULL value therefore i would like to do some error checking such that when the SQL statement returns NULL, i will direct the user to another page.
Is it possible for me to try sth such as:
if strSQL = SELECT .. FROM .. WHERE .. = NULL then
response redirect ...
Was wondering if anybody would be able to give me some advise.
VBA creating and have spent about 4 hours trying to figure out the error with my simple loop to update a few fields. As you can see from the attached picture, the "Recalc" sub simply stops updating partway through the loop.
I wrote the code below in a module. The text box that this part of the code is getting its value from has a DLookup in its control source. The problem is that when the DLookup does not match the criteria it looks for, it returns Null. The code tries to assign Null to a variable of type currency and that returns an error. Is there anyway to convert the Null to 0?
All the function: Public Function CalculateDepositPlusVO() Dim vAgreedPrice As Currency Dim vtxtTotalVO As Currency Dim vtxtAgreedPricePlusVO As Currency
Forms![frmHouse]![qryHouse4].Form![AgreedPrice].SetFocus vAgreedPrice = Forms![frmHouse]![qryHouse4].Form![AgreedPrice].Text Forms![frmHouse]![qryHouse4].Form![txtTotalVO].SetFocus vtxtTotalVO = Forms![frmHouse]![qryHouse4].Form![txtTotalVO].Text vtxtAgreedPricePlusVO = vAgreedPrice + vtxtTotalVO Forms![frmHouse]![qryHouse4].Form![txtAgreedPricePlusVO].SetFocus Forms![frmHouse]![qryHouse4].Form![txtAgreedPricePlusVO].Text = vtxtAgreedPricePlusVO End Function
I have a count column in this query, and i would like for it to return a zero instead of null if it doesnt find anything to count. Here's the SQL for the query.
Code: SELECT Documents.Status, Count(Documents.Document) AS CountOfDocument FROM [Request Details] INNER JOIN Documents ON [Request Details].Request_ID = Documents.Request_ID GROUP BY Documents.Status, [Request Details].Contract, [Request Details].CDRL, [Request Details].Change_Cycle HAVING (((Documents.Status)="No Record") AND (([Request Details].Contract)=[Forms]![Report Runner]![Contract]) AND (([Request Details].CDRL)=[Forms]![Report Runner]![CDRL]) AND (([Request Details].Change_Cycle)=[Forms]![Report Runner]![ChangeCycle]));
I looked thru the forums and didn't seems to get what I needed;
I want a count query to give me all fields in "group by" column, and assign 0 to where there are no count for certain fields.
I tried to set Outputallfield to "yes" but got an error message saying that there is a data type mismatch. The query ran just fine when outputallfield was set "no" and gave right results.
If one of the fields are 0 then it returns this error on my Reports in the Field and/or in the Sum of these. I read somwhere to create a tblDivByZero table but since I'm a novice I still can't make this work.
How to Elimate #Div/0! Errors in MS Access Reports
I'm creating an item look-up form with 2 criteria that I wan't to auto-filter as the user types. I'm placing my code in the Change event of the textbox, and only calling the .text for the current textbox (.value or no property at all for the other). The filter works smoothly and as intended until it returns no results in my table, and then it pops me with the error. I've tried forcing focus to the textbox in different places throughout the code, but to no avail. If I use the .value or no property for the current textbox, I'm not getting the CURRENT text, but the old text before it was changed, so the filter doesn't work properly.
Private Sub txtVendor_Change() Me.FilterOn = True Me.Filter = _ "((strSearchVendor Like '*" & Me.txtVendor.Text & "*' AND strSearchItem LIKE '*" & Me.txtPartNum & "*'))" Me.txtVendor.SelStart = Len(Me.txtVendor.Text) End Sub
It usually pops the error on the last line "Len(Me.txtVendor.Text)", but I've had it do it on the Me.Filter line as well (only when debugging and messing with next statement placement).
When counting in Access and a null value is returned I would like this value to be "0" rather than null. I have experimented with IIF and Nz but have been unable to find the key.
How would this be accomplished? I've include a simple code.. Thanks..
SELECT Count(Table1.[Column One]) AS [CountOfColumn One] FROM Table1;
I'll try to make this as simple as possible, but please ask for clarification if I'm unclear:
*I have one pass-through query to Informix that pulls all available class schedule information. *I have another local query that uses information in a local table to restrict that query to a particular year and semester, chosen by the user. *I have a function TimeConv that takes the numeric value used in the Informix db to store times (e.g., "1300") and converts it into a real time value (e.g., "1:00:00 PM").
The problem is this: While the TimeConv function by itself always works in the local query, if I try to perform any comparisons on it, I get the error message "Invalid Use of Null". There are no null records in the restricted data. If I put the semester and year restriction directly into the pass-through query instead of the local query, the comparison operations work just fine. (But it's important that the user be able to change this without editing the SQL directly.) Only when that restriction is in the local query do I get the error message.
I've tried several ways of filtering out Null values from both queries, and it doesn't seem to make any difference. If I Nz() the fields before passing them to the TimeConv function, I instead get the error "Invalid procedure or argument call", I believe because it insists on reading "0000" as "0", which is too few digits for the function to work.
I get the same results if I try to run it through yet a third (local) query.
Relevant code and SQL below. I'm really stumped on this one. Thanks in advance for any suggestions!
WHERE t1.cat="UG93" and t1.crs_no=t2.crs_no and t1.cat=t2.cat and t1.crs_no=t8.crs_no and t1.cat=t8.cat and t1.yr=t8.yr and t1.sess=t8.sess and t1.sec_no=t8.sec_no and t8.mtg_no=t3.mtg_no and t1.crs_no=t4.crs_no and t1.cat=t4.cat and t1.yr=t4.yr and t1.sess=t4.sess and t1.sec_no=t4.sec_no and t1.fac_id=t5.id and t2.crs_no NOT IN ("JFESSA", "FRESSA", "SOESSA", "JRESSA", "MAESSA", "MAORAL", "DEPO", "DEPO2", "SRESSA", "SRORAL") and t2.dept=t6.dept and t7.prog=t2.prog and t7.sess=t1.sess and t7.yr=t1.yr and t5.id=t9.id; If I add this criteria, functionally equivalent to the first WHERE statement in the local query below, it all works fine: AND t1.yr=2005 AND t1.sess="SU"
Local Query (qryCatalog): SELECT qpj1.days, qpj1.room, qpj1.crs_no, qpj1.bldg, qpj1.mtg_no, qpj1.sec_no, qpj1.beg_date, qpj1.end_date, qpj1.beg_tm, qpj1.end_tm, qpj1.sex, qpj1.abbr_name, DateDiff('h',TimeConv([beg_tm]),TimeConv([end_tm])) AS NoLongLab
FROM qryPassJoin1 AS qpj1, tblSettings
WHERE (((qpj1.beg_tm)>0) AND ((CInt([yr]))=CInt([tblSettings].[catyear])) AND ((qpj1.sess)=[tblsettings].[catsess]));
The comparison criterion I would like to add here is: AND ((DateDiff('h',TimeConv([beg_tm]),TimeConv([end_tm])))<=2)
Function TimeConv: Public Function timeconv(numtime As Variant) As Date timeconv = CDate(Left([numtime], (Len([numtime]) - 2)) & ":" & Right([numtime], 2)) End Function
I would like a MsgBox to pop up for the user if the Priority field is blank and the box count is not. I tried doing this on the report but the report will just not run. So I considered adding a module to the query.
However, I get a Data type mismatch. Below is the module and query. Can someone help me with this?
Function ErrorPriorityReport(ByVal BackPriority As Integer, ByVal BackBoxes As Integer, ByVal Priority As Integer, ByVal SumOfBoxes As Integer) As String If BackPriority Is Null And BackBoxes <> Null Then MsgBox "Report will be inaccurate! There are blank priorities. Please run report on Customer Menu!", vbOKOnly, "Missing Priority" End If
If Priority Is Null And SumOfBoxes <> Null Then MsgBox "Report will be inaccurate! There are blank priorities. Please run report on Customer Menu!", vbOKOnly, "Missing Priority" End If End Function
Here is the field in the query calling the module: ErrorCheck: ErrorPriorityReport([BackPriority],[BackBoxes],[Priority],[SumofBoxes])
I have a left-join query where I know that some of the values in the left-hand table have no corresponding values in the right-hand table...that's why I used a left-join: I want all the values in the left-hand table to show up. I would expect that records without corresponding values in the right-hand table would show up as nulls (I swear I have dozens of other queries that work this way) but in this one, they show up as "#error" instead.
This is a problem because I want to do some calculations on this field. Normally I would use the nz function to change the nulls to zeros.
So, 1. Any idea why this is happening? 2. Is there a way to change the #error values to zeroes, similar to using the nz function?
HEre's the SQL: SELECT FeederInventorySummary.machine, FeederInventorySummary.Size, FeederInventorySummary.Leaf, FeederInventorySummary.Type, FeederInventorySummary.CountOfFeederID,FeederNeeds Summary_7.FeederQty FROM FeederInventorySummary LEFT JOIN FeederNeedsSummary_7 ON (FeederInventorySummary.Type = FeederNeedsSummary_7.Type) AND (FeederInventorySummary.Leaf = FeederNeedsSummary_7.Leaf) AND (FeederInventorySummary.Size = FeederNeedsSummary_7.FeederSize) AND (FeederInventorySummary.machine = FeederNeedsSummary_7.ActualMachine);
For every record without a corresponding record in FeederInventorySummary_7, the FeederQty field shows up
SELECT Payment_Mth, CDate(Payment_mth) AS Expr1 FROM Table1 WHERE (((Payment_Mth) Is Not Null And (Payment_Mth)<>"Does not apply" And (Payment_Mth)<>""));
I get a set of data along the following lines September 2007 01/09/2007 October 2007 01/10/2007 September 2007 01/09/2007 etc. which is what I want.
However, when I try to filter to show only a particular date, I get an error
SELECT Payment_Mth, CDate(Payment_mth) AS Expr1 FROM Table1 WHERE (((Payment_Mth) Is Not Null And (Payment_Mth)<>"Does not apply" And (NBReferral.Payment_Mth)<>"") AND ((CDate(Payment_mth))=#01/10/2007#));
Private Sub Form_Current() Dim strTime As String Dim strHour As String Dim strMinute As String If (CollectionTime.Value) = "" Then MsgBox CollectionTime
The basic idea is that I need to insert a record into a table and then return the Key field so that I can use it to populate another table. This was working just fine for a while, then it stopped and naturally I can't think of anything I did to make it not work. I get an Invalid Use of Null error at the bolded step.
Dim SQL As String Dim SpecID As Long Dim VerifySpec As Variant ' Check for empty strings If Len(Me.txtNewPartNumber & vbNullString) = 0 Then Response = MsgBox("Part Number cannot be blank.", vbExclamation, "Missing Data") Exit Sub End If
I have found the error leads to this line but how can i stop the error?
Run-time error '94': Invalid use of Null.
Option Compare Database Option Explicit Dim Msg As VbMsgBoxResult Dim StartText As Long Dim TextToFind As String Dim TextToBeSearched As String Private Sub Form_Current()
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.
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
I am developing a database for my company which will produce reports based on data entered on various forms.
When the report opens, I would like its name to dynamically change to include the site, the client and their reference number. Although I know very little VBA, from searching this and other forums I have managed to get this to work on other forms.
On a different form, I have managed this by giving the form the caption "Caption" and then running the following code on load:
However all this produces is "Property Assessment for , reference". If I try entering just "[SiteDetailsAddressLine1]", "[ClientDetailsName]" or "[PropertyAssessmentClientJobNumber]" I receive an Invalid use of Null error message.
If I create text boxes on the report for [SiteDetailsAddressLine1], [ClientDetailsName] and [PropertyAssessmentClientJobNumber] they are filled with the correct information so I know that these fields are not blank.
The following code works fine until it gets to last record, then it give me Error # 94 Invalid use of null. I have searched all of my code and null is not in the code.
Code: '-------------------------------------------------------- ' Goes to next record '--------------------------------------------------------- Private Sub cmdNext_Click() On Error GoTo err_handler ' DoCmd.GoToControl (txtNameL) ' DoCmd.GoToRecord , , acNext
My problem is this: Whenever I enter something into the form other than first choosing the date from the DateTimePicker's drop-down list, I get the notorious error message: Can't set value to NULL when CheckBox property = FALSE.
What I can conclude is that the DateTimePicker can seemingly not return a null value to the database. A possible solution was given at this site: http://www.dotnet247.com/247reference/msgs/54/270422.aspx
I however, have no idea how to apply this to my form.
My issue is that I am trying to update a date field. When I do the date field may have a date or may be a null. When I try to pass in a NULL date with no quotes, I get a syntax error. When I have single quotes in the statement and a null value is passed in, I get an invalid use of date.
Dim DENIEDDATE1 As Date If (Not IsDate(rs.Fields("DENIED_DATE"))) Then DENIEDDATE1 = Null Else DENIEDDATE1 = "'" & rs.Fields("DENIED_DATE") & "'" End If
update table1 set table1.denieddate = " & denieddate1 & " 'get Update syntax error with this statement update table1 set table1.denieddate = '" & denieddate1 & "' 'fails due to invalid use of null
i have these code to auto generate member number but the highlighted line generate error 94 - invalid use of NULL:
Private Sub cmdGetNumb_Click() 'On click of button a new Member Number is generated and 'focus is moved to tFName field. Me![nMembNum] = NewMembNum() Me![tFName].SetFocus 'Prevent accidental click Me![cmdGetNumb].Enabled = False
I have a form and when it's opened you get 3 different search questions to answer or leave blank. My question is.... If a search parameter is entered but no results are found to match it, how do I create an error message telling the requestor "No Data Found"?
