Convert null to "" in Access
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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.
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!
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
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.
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
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?
=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:
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
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?
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"
Me.test = "NOT NULL"
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