Null Columns
Nov 8, 2007
Hi
Can someone help me with this query below.
Is there a way to list all columns in a table that contain Null Values. I have imported data into a new table but not all columns contain data. I need to write a query to list all the columns that have null values.
The result needs to give me a list of columns that do not have values in it. These need to be across the entire column ie if there is data in 1 row out of 1000 rows in column A, then the query should exclude this as it contains data.
I hope this is not too confusing but i am having trouble getting this query to work.
Avinash
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Aug 8, 2013
I was able to use the UNION ALL qry. But, when I have another file (like original2) that does NOT have all the columns listed in the UNION ALL qry, I get a Parameter value box asking for the missing columns when I run the qry.
Example:
original1IDDateGroupChristianJohnnySteve 18/5/2013A1528/5/2013B338/5/2013C2348/5/2013D2358/5/2013E5
original 2IDDateGroupChristianJohnny18/6/2013A212528/6/2013B2338/6/2013C2248/6/2013D22
The UNION ALL qry includes all the possible resources ( includes all the possible column fields Christan, Johnny, and Steve).
When I run the UNION ALL qry with the original2 file, An "Enter Parameter Value" box is displayed with the mssing column name "Steve".
Is there a way to Map the original2 table into a working table with all the columns, or use VBA code to construct the UNION ALL qry to only include the existing columns? My data has variable columns and I'm trying to avoid the parameter popups.
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Nov 16, 2014
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
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Jul 5, 2013
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] ....
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May 14, 2014
I have a MS ACCESS 2010 database with a data table which i am trying to create a query from. I have 6 columns of data( one with an ID Field and 5 Name Fields). Below i have made examples of how it first appears as a simple query and the second will show you what i would like it to look like.
What the simple query looks like: [URL] ...
Second what I want the query to look like: [URL] ....
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Apr 18, 2006
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.
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Oct 30, 2007
Currently I'm building tables and forms. My first table (called Clients) lists the details of fictional clients. My second table is for invoices.
In my invoices table, I wish to link the column for client reference (note: stored in the Clients table) to the column that precedes it. This column will list the clients’ names and is selected from a drop down list that is linked to the Clients table.
What I want to do (if its possible) is to have the respective client ref. automatically show up in the next cell once I've selected the client to whom the invoice relates?
Am I making sense? Is that possible? If so, how do I do it?
Secondly, how do I do a sum of selected columns for my “totals” column? Basically, I want to add the figures found in several cells that precede it?
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Mar 22, 2007
I'm affraid my confusing topic title is an indicator of how confused I am by this. I can't even understand the variables well enough to fully utilize Access Help or the Search function here...
What I have is a database hat has column headers that look something like this:
Customer_Name, Order_Date, Qty_Ord, Unit_Price, Total_Price
What I'm trying to get is a query output that will have
Customer_Name, Total Orders (in Dollars) for January, Total Orders (in Dollars) for February, Total Orders (in Dollars) for March, etc.
I've been able to set it up to SUM for one month, but not multiples.
I know I'm totally lame (for proof read any of my previous posts) but you guys totally bailed me out the other time I asked a lame question.
Thanks in advance!
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Apr 3, 2008
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.
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Nov 16, 2006
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
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Nov 16, 2007
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?
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Jul 31, 2013
I am trying to convert a table that looks like the following...
Customer Name SumofSum of Bill Rate Reviewer
000462 John 500 Mike
000224 Mike 900 Jeff
I would like to covert it to....
Customer 000462 000224
Name John Bill
SumOfSum.. 500 900
Reviewer Mike Jeff
I don't think Access has any functions for this but I am not 100% sure. I know this can be done in a Module but I am not sure of how to code it.
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Feb 19, 2008
Hi All,
I have a Append query which has columns from two tables. Now i need to create a new column "Sum" in new table which should Add two of the Number columns .
That is : I have column A and Column B; I need to create a Column C which contains (A+B)
Please advise.
Thanks,
Kon
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Jul 3, 2005
I have created a data base over the last few months I just kept adding information in the fields that I created but now have a problem I have the sections in a drop down menus of which access will let me ad info but when I com to save I get this message
"Index or primary key cannot contain a null value"
Access will not let me save any added info in any field I have tried all the ways that I know to get round this problem to no avail it is most properly some think silly but I am desperate now as I have worked hard on this project.
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Aug 1, 2005
I am using Access to connect to a sybase (symposium) database... I pull records depending on what state the record was pegged.... This is based apon a user inpuyting a code on a telephone. Of the user puts a number that does not reprsent any of our set codes it will show the code feild as blank or null. I need to make this blank feild something representable as furhter down my querys it removes these blanks or nulls. I would like the blank field to be shown as "Bad Code"
Any help would be great...
p.s I have used iif and as and like and nothing is working..
Ta
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Aug 3, 2006
Hy guys!
I would like to know if is any way to inverse the following code:
This:
if isnull (txt1) then 'recognise if the box is empty
to something like this:
if isNotNull (txt1) then 'recognise if the box is not empty
Thanks
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Jul 17, 2007
In response to: http://www.access-programmers.co.uk/forums/showthread.php?t=131593
I personally believe 'NULL' should be banned as a possibility entirely. :eek:
It has been pounded into my head that 'NULL' is not the same as 'EMPTY' or 'ZERO'; and that it literally means 'NOT KNOWN'. Now consider a contact database that has a field for lets say Apt# or Street Direction such as N or S or ?? as an example. There are many, many instances where these fields would be left blank or empy: NULL | NOT KNOWN. When in fact the situation is known: the object has no such attribute; and in query or some other form of program logic the venerable NZ(subject, response) function may be used which would replace the NULL with a value. Or program logic and or error trapping would be used to handle such occasions. Which is an absurd waste of time and talent IMHO.
Therefore, if there is no applicable attribute to enter (something known) why not say so with 'N/A'? Else what we are saying by using 'NULL' is that we are building a dataset containing data that cannot be known. Kind of like saying
This statement is FALSE
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Jul 17, 2007
In response to: http://www.access-programmers.co.uk/forums/showthread.php?t=131593
I personally believe 'NULL' should be banned as a possibility entirely. :eek:
It has been pounded into my head that 'NULL' is not the same as 'EMPTY' or 'ZERO'; and that it literally means 'NOT KNOWN'. Now consider a contact database that has a field for lets say Apt# or Street Direction such as N or S or ?? as an example. There are many, many instances where these fields would be left blank or empy: NULL | NOT KNOWN. When in fact the situation is known: the object has no such attribute; and in query or some other form of program logic the venerable NZ(subject, response) function may be used which would replace the NULL with a value. Or program logic and or error trapping would be used to handle such occasions. Which is an absurd waste of time and talent IMHO.
Therefore, if there is no applicable attribute to enter (something known) why not say so with 'N/A'? Else what we are saying by using 'NULL' is that we are building a dataset containing data that cannot be known. Kind of like explaining:
This statement is FALSE
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Apr 9, 2008
how do I set an entire colum to not accept nulls. example I have a colum that will be checkboxes. I want all the checkboxes to be in the unchecked state.
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Oct 6, 2005
When filtering by form I suddenly get the words: Is Null / Is Not Null appearing in the drop down menu of all fields.
I can then no longer filter at all?
This is carried over to filter by form too!
When I export, or cut and paste the records into my backup database (filters working ok before I do!) the same thing happens!
Can anyone help….please?
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Jul 7, 2005
Is there somekind of reverse Nz() function?
I want Zeros to become null in my query!
..or I almost rather change "#Error" to 0(Zero) if that is possible?
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Jul 26, 2005
Hi
I've searched this forum but dont seem to be able to find the right info on this....
I have a form that passes parameters to a query (a user search form). I want it to display records based on the following criteria:
1. If Null display all the records
2. Use wildcard values (i.e. "Blog" would return "Bloggs")
I'm using this criteria at the moment:
[Author] Like [forms]![Search].[Author] Or [forms]![Search].[Author] Is Null
But the wildcard bit doesn't seem to work. I'm sure I need some kind of 'Or "*"' instead of 'Like' but need some expert help.
I have searched on this extensively but apologise if I've missed something.
Cheers
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Jul 29, 2005
I new to access and need some help, here is my problem. I have a query that gives data to a table, the only problem is that there is blank fields in the query and from what I read that is not a good thing when doing calculations. Here is the formula that I am using in the query
DaystoCloseNonQSF: IIf([QSFNonQSF]<>"qsf",CalcWorkdays([DateReceived],[DateCompleted]),"")
Then I need to get the average of the days that this formula returns, since there is blank fields it won’t.
I hope that this makes sense.
Thanks
Greg
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Jul 23, 2007
Hi,
I am trying to create a query whereby it will only show only those records when the x field is null. I also need a separate query to do the opposite, i.e. to show only those records which have x field not null.
How can I do this?
I know I need a statement on the x field but don't know what it is?
Thanks in advance!
Steven
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Aug 9, 2007
Hello all,
I'm trying to get this to work but is having a few problems. Hope someone can help.
SELECT *
FROM MTL_Log
WHERE (((MTL_Log.AccountingName) Is Null) AND ((MTL_Log.AccountingID) Is Null) AND ((MTL_Log.AccountingDate) Is Null));
I have the above right now. But it's not working right.
I need the statement to pull all the records where AccountingName and AccountingID and AccountingDate are null and also if any of the field is null. Right now, if at least one of the field is filled in, the do not show in my report.
Any ideas on how to get this to where if any of the field is null then the record will show?
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Aug 31, 2007
I have a table with a name field and five other fields. I want to create a query where it would tell me if the fields have anything in them or not. I created a query and put in the criteria "is null" and I got nothing in return. Then I put "is null" in the first criteria field and "is null" in the remaining field, but on the "or" criteria line. It worked, but I'm missing records because they dont add up between the number of records in the table and between the nulls and not nulls. Can anyone tell me why and what I am doing wrong please?
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