Convert null to "" in Access

Is there a way "using NZ or whathaveyou) to convert null values INSIDE A TABLE to "" using an update command or other method. I know how to do it in a query, but I would like the imported data itself manipulated

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updating field whose value is the word NULL and Not a typical 'null' value
I was given a table where in a text field, the value is NULL. (Actually spelled out like that.)
I need to convert that field to a date/time one. Which is being hindered by these values of NULL.

The problem is that when I put the word NULL in the field criteria spot, Access believes that I am referring to a value of 'null' and will not do the update.
I have done "NULL", NULL, =NULL, ="NULL", is NULL. and no success.
Please remember that the actual value is not 'null'. It is a text field that has the word NULL in the field.


Preventing a Null error
Due to database design, I am not allowing Null values in my tables. On my main form, the default value for the text boxes is " ". However, if the user removes the zero-length string, they will get a Null error.

I've tried many different things to capture the Null entry and convert it using the Nz() function, but I can't get rid of it!


Flow chart from VBA IIF function
I frequently use complex iif statements in queries or in VBA and after a certain number of months when I look at these functions, I first have to manually draw a flowchart to see what the statement actually does.

Is there an automated way/tool which could do this for me.
(then I could also document the complex statements immideately - as I should be doing like all other programmers.) )

an example would be :

IIf([Contract status]="w","W",IIf([Quantity] Is Not Null And [Quantity]>0,IIf([escalation items].[PN] Is Not Null,"1",IIf([bo]>0,"2",IIf([sos] Is Not Null And [sos]+90>Date(),"3",IIf([ut]="4" Or [ut]="5","4",IIf([PartStatus]="y","5",IIf([sos] Is Not Null,"6","7")))))),IIf([sos] Is Not Null,"8","X")))

I did find a tool which analyses VBA into flow charts, but not IIF's or IF functions


How to convert generated field in Select Query to VBA?
All,

I've got the following IIF monster in a field in a select query. Can someone give me some advice on how to make this more manageable? I'm hoping to convert it to VBA as it's just a monster to try and manage or make changes to this. I'd like to convert this to VBA and then reference the result in the select query and not convert the entire select query over to VBA as I'm trying to keep this project as simple to manage for someone else who doesn't know VBA as possible.

GeneratedDueSemi: IIf(IsNull([ARMS_DUE_DT]),IIf(IsNull([ACC_DT]),Null,IIf([Remaining]<1,IIf(DatePart("q",[ACC_DT])<3,CDate("12/31/" & Year([ACC_DT])),CDate("6/30/" & (Year([ACC_DT])+1))),IIf([Remaining]>0,IIf(Year([ACC_DT])<Year(Date()),IIf(DatePart("q",Date())<3,CDate("6/30/" & Year(Date())),CDate("12/31/" & Year(Date()))),IIf(DatePart("q",Date())<3,CDate("6/30/" & Year(Date())),CDate("12/31/" & Year(Date())))),Null))),Null


What exactly does &quot;null&quot; mean in Database?
First I tried to look at it as a "zero" (with a little confusion though) when I came across it in some queries, or think about it as a text string of blank spaces.
Null means either "not applicable" or "don't know": it's not really the same as zero (0) or any other default value, but more importantly, null is treated quite differently from other values in SQL, because it literally has no value.


Passing criteria "NULL" or "IS NOT NULL" to a query
I want to pass the criteria "NULL" or "IS NOT NULL" to the underlying query in a report from a field on a form where all criteria for the particular report is selected before running the report. Typicially the procedure I use is to place the name of the control from the form in the criteria field of the query. example. if I'm providing a date to the query, I put a date field on the form and put the full name of the field "forms!myform!fieldname" in the criteria field of the query underlying the report. This is pretty bullet proof, except when I want to pass a value of "null", or "not null" as the criteria for a given field in the query. How can I set up a combo box, or command button, or selection box to feed the values "NULL" or "NOT NULL" as criteria the underlying query


convert vlookup to access
I have an Excel formula that I need to convert to Access 2007:

=IF(F8="Active",IF(AND(C8<>"None",C8<>"COM"),VLOOK UP(N8,AQ6:AV11,L8+1,FALSE ),IF(C8="COM",VLOOKUP(J8,AX7:AY11,2,),"Error")),"N ull")

The vlookup looks to this:
AQ6:AV11
AX7:AY11

The cell references like C8,N8 are values in the first column of the vlookup fields. This is for a ratings table.

It took me a while to figure out vlookup and it's real cool, but not in Access. I know I would have to use VBA to reproduce this, but umh not brainy enough


Concatenate multiple fields that might have a null value
Hope someone can help. I'm trying to concatenate many fields into one field and some have a null value. And some need to have a description added in front of the value.
Field1 = Bldg Name (maybe null)
Field2 = Street
Field3 = Floor (maybe null)
Field4 = Room (maybe null)
Field5 = City

My problem is that in front of [Floor] should be "FL:" only if that field is not null. However, I keep getting the "FL:" in front of everything. How do I not include that when that specific field is null?


Multiple validations in same field
I need to enter into a field either Null OR "N" OR "Pn" The Pn is a unique number between P001 and P999.

Obviously the "no duplicates" rule for Pn will interfere with the "N" entries. Is there a way around this?

Alternately, the operators who enter Null or "N" use one form, and the operators who enter Null or Pn use a different form. Is it possible to create different validation rules that are tied to the respective forms?


Dsum 4th Critieria (can be null)
I have "hopefully" a quick one. I have below code and need to add one more parameter to it however that parameter can be "null" if they don't want to choose the unit.

Nz(DSum("[DonorCnt]", "qHD_SummaryR1", "[Month] = 1 AND [year] = " & Me.cmbyear & " AND [Hosp] = '" & Me.cmbHospital & "'"), 0)

How would I add that?

Field type: text
Name: me.cmbUnit
Can be null value


CInt and Invalid Use of Null
I have a query containing an expression that subtracts one date/time field from another. Once that action is performed I only want to see the positive outcomes and not the negatives. Since subtracting/adding date/time fields (I believe) results in a text output, I'm using the function CInt to convert the result to a number and then putting the criteria ">=0" on the field. When I run this query I get the error message "Invalid Use of Null". Help, anyone


filling a table
I have a table with one record that is sometimes filled and sometimes null. I'd like to fill the table "downwards" along the lines
HAVE WANT

a a
null a
null a
b b
null b
c c
d d
null d
Quasi-program:
FillStr="xx" (default)
loop while not EOF
if rst.string="null" then set rst.string=FillStr
else FillStr=rst.string
loop
Now all I need is the exact syntax to do this.


Trying to trigger an event if my cbo box control Is Null or ""
I'm trying to trigger an event if the SSN combo box control in my form Is Null or "". It just won't work.

I have attached an access file with the form and the underlying table which is the record source for the SSN combo box control. To demonstrate my problem, I have a text box which is filled by the after update event of the control with this code:

Private Sub SSN_AfterUpdate()
If Me.SSN = "" Or Null Then
Me.test = "NULL"
Else
Me.test = "NOT NULL"
End If
End Sub

When I choose a SSN from the combo box control, text box test is updated to "NOT NULL". When I clear the combo box, nothing happens. Text box test is not updated with "NULL


Why am i getting Null fields with this query?
Like "*1083*" Or Like "*4048*" Or Like "*1083*" Or Like "*4049*" Or Like "*4050*" Or Like "*4052*" Or Like "*6001*" Or Like "*6464*" Or Like "*8602*" Or Like "*8603*" Or Like "*8609*" Or Like "*8627*" Or Like "*8628*" Or Like "*8629*" Or Like "870*" Or Like "871*" Or Like "872*" Or Like "873*" Or Like "874*" Or Like "876*" Or Like "*,870*" Or Like "*,871*" Or Like "*,872*" Or Like "*,873*" Or Like "*,874*" Or Like "*,876*" Or Like "*8751*" Or Like "*8752*" Or Like "*8753*" Or Like "*8757*" Or Like "*8758*" Or Like "*8759*" Or Like "*8770*" Or Like "*8776*" Or Like "*8800*" Or Like "*8805*" Or Like "*8806*" Or Like


Populate other fields in same table using if then statement
I have table called RaceEntry2

Numeric Fields are lapNo, Lap1 , Lap2, Lap3 , Lap4, Lap5
RaceTime = "General date field"
If LapNo = "1" then lap1 = Racetime and Lap"2 -5" must be blank (Null)

I would like to combine this function and have something like

If Me.Lapno = "1" Then me.lap1 = me.racetime and Me.Lap2 = Null and Me.Lap3 = Null and Me.Lap4 = Null and Me.Lap5 = Null

if lapno = "2" then me.Lap2= me.Racetime and me.lap1 = Null and Me.Lap3= Null and Me.Lap4 = Null and Me.Lap5 = Null etc etc


Executing MySQL Statement
I have a variable that contains a perfectly acceptable MySQL statement (as in, I can copy it into mysql directly and it works) yet when I run it through CurrentDb.Execute VariableName I get "Too few parameters. Expected 1."

[CODE]

Which the makes

INSERT INTO ticketchanges VALUES (NULL,46,DEFAULT,'few af ae a',NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,2);

The only thing I can think of is that I'm not declaring the column names because as you can see by the code, it's rather dynamic. So.


Query not returning null values
version - my child query is not returning null values. I have 2 fields, both pulled from a parent query. One is "DaysSinceRecd", the other is "AmountPaying". The parent query returns multiple results, which is fine. For example, the parent query might have 10 different records for "0" "DaysSinceRecd", with different "AmountPaying" for each of those records. In the child query, I am trying to condense that down, so that I only have one "AmountPaying" for each "DaysSinceRecd". It's working fabulously, except that there are records in the parent query that have a value for "AmountPaying" but a null value for "DaysSinceRecd". The null value for "DaysSinceRecd" cannot be changed to another value, it needs to stay null. My child query is not returning the null records. I tried adding to the criteria: IsNull Or IsNotNull, >=0 or <=0. That's not working. I'm a novice, so speak slowly, please . TIA for any help that you can provide


Test for null in query
new to forum and Access. try to make this short I have used the below code to compare two like tables in the past, both tables I have control over so it worked great.
CLLI_CODE: IIf(Nz([RDFO LOC Table]![CLLI_CODE],"Null ")<>Nz([RDFO LOC Table SharePoint]![CLLI_CODE],"Null "),"Change","No Change")

however today I have need for a similar line of code that would first test the first field from the first table to see if it is null and if it is stop right there and not go on to compare it. however if the field isn't null compare it to another field in another table


Multiple validations in same field
I need to enter into a field either Null OR "N" OR "Pnnn" The Pnnn is a unique number between P001 and P999.

Obviously the "no duplicates" rule for Pnnn will interfere with the "N" entries. Is there a way around this?

Alternately, the operators who enter Null or "N" use one form, and the operators who enter Null or Pnnn use a different form. Is it possible to create different validation rules that are tied to the respective forms


Is Not Null...Multiple fields
I am creating a query to scrub out certain records from a table. How would I exclude records where BOTH the "Phone" and "Email" fields are null? I do not want to exclude them if "Phone" field is not null but the "Email" field is, or vice versa.

I currently have tried WHERE ((([RAWCancels]![Phone number] And [RAWCancels]![Email]) Is Not Null)), but it is not working.

I'm sure I am just overlooking something here, but I have hit a wall trying to figure out how to write the criteria.