How To Handle Multiple Null Values Using Form-based Parameter Queries
Nov 19, 2012
i'm creating a search form giving the end user a range of controls to use when filtering/searching data. See the image.But, i think my range search (using the textbox) to put in a lower and upper limit...is preventing this from working. In fact, when i put data into all the controls, no data pops up in my subform.
My query data source can also be seen...showing you how i've handled teh null entries. (i need to put in a null 'handler' for the two textboxes?)
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Jan 17, 2014
I am trying to alter this parameter to bring back all records if either beginningsalesrange or ending salesrange is left blank. I can't quite get it right.
Between [forms]![frmState]![BeginningSalesRange] And [Forms]![frmState]![EndingSalesRange]
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Apr 17, 2014
how to return all values in a query when a form critieria is left blank. I have made some progress, the combo box criteria queries were fairly simple, but i'm getting stuck with my date criteria. My query doesn't return null values when I want it to.
I want it to return all records (including null values) if the form OpenFrom and OpenTo dates are blank, and just the values between the selected dates (excluding null values) if the form is completed.
Code:
SELECT qryReportSelector2_Authority.*, qryReportSelector2_Authority.ApplicationDate AS ApplicationDateFilter
FROM qryReportSelector2_Authority
WHERE (((qryReportSelector2_Authority.ApplicationDate) Between Nz([Forms]![frmReportSelector]![OpenFromDate],DMin("[ApplicationDate]","[qryAllCases]")) And Nz([Forms]![frmReportSelector]![OpenToDate],DMax("[ApplicationDate]","[qryAllCases]"))));
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Aug 12, 2013
If I want to sum the percentages from April, May and June only if a column is Not Null, how would I do that?
example
Tbl 1
PK, Month
Percent
Tbl 2
FK, Month Enrolled
Qty of Rx in the 1st month enrolled
Qty of Rx in 2nd qtr
Base (if Qty of Rx in 2nd Qtr is null then Qty of Rx in 1st month enrolled)
If Qty of Rx in 2nd QTR is NOT NULL then QTY of Rx in 2nd Qtr * Sum of April Percent+May Percent+June Percent, otherwise Qty of Rx in 1st month enrolled * Month Percent
Im getting stuck on how to sum the percents of April, May and June and then multiplying the result times the Qty ONLY IF the field is not null.
I only know how to create Query's using the design mode. I dont know how to write SQL statements.
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Nov 14, 2012
My form-based search mechanism uses controls to set the parameters for the query data source.
I have one field call quantity in stock. I could you a Between and And method to allow the end user to input the stock quantity they want.
HOWEVER, i would love it for the user to first select the Comparison Operator (e.g. > , <, >=, <=) from a combo box and then in an adjacent text box, enter the quantity.
The expression i entered in the query goes something like this.... Forms![frmSearch]![cboRange] & [Forms]![frmSearch]![txtQuantity]
When i try and run this, i get the message "THe expression is too complex to be evaluated".
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Sep 22, 2014
For my study on academic research I need to match patents that refer to academic research as prior work with the actual prior work.
I have two tables (see attached images below).
One regarding AcademicPublications (AP), which is neatly organized with title, year, journal, volume, pages, first author, etc... 480,000 rows
One regarding Patentswhere all this information is hidden within one field, in the most messy way possible... for instance, a field could have:
Quote:
Sugita et al, "Nonsurgical Implantation of a Vascular Ring Prosthesis Using Thermal Shape Memory Ti/Ni Alloy (Nitionl Wire)," Trans. Amer. Soc. Artif. Intern. Organs, vol. 23, pp. 30-34.
or
Quote:
Willingham et al., Cell 13, 501-507 (1978).
Or many other ways.
I want to create a new table that is set up like this:
Patents.PatentNumber | AP.ID | Patents.Reference | AP.Title | AP.Year | AP.Volume | AP.PageStart
The question is: How do I match different fields from one table on one field of another and make it return another field (the ID)? Some references are too horrible to match, but I need as many as I can get.
I can imagine two queries would give me the bulk:
A match in [Title] AND [Year]
A match on ([SourceTitle] OR [AbbreviatedSourceTitle] ) AND [Volume] AND [Year] AND [PageStart]
I understand that I have to make use of the Like "*"&[value]&"*", but how do I make it return the matching ID?
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Feb 10, 2015
Currently we track areas of non-conformance for a fleet of flight simulators. Each flight simulator has a particular ID number. In some instance an area of non-conformance is associated with a single simulator, at other times it is a fleet wide issue and applies to all or some simulators. In order to track as well as advise leadership and the contractor responsible for maintenance of the simulators of the situation we generate individual response letters.
In order to track each instance of non-conformance my idea was to create a new record for each deficiency. In the event that it is applicable to multiple simulators I would like to fill out the form with all pertinent data and then place a checkbox associated with each simulator and when the record is saved, it creates one record for each simulator with a checkbox ticked.
Once the deficiency on each simulator is fixed, I would check a box for a field called rescinded, which would remove that particular deficiency on that particular simulator from the active list of deficiencies but the others would still remain because they are associated with unique records.
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Jan 31, 2015
I need to enter workload counts for 10 people, and it is done on a monthly basis. So I have a table of Months (Jan-Dec), a table of names, and a joined table with the months, names and a field for the workload counts.
I would like to make a form where I could select the month and all the names show up so I could go and enter the counts for everyone at the same time. I've attached a diagram to show what it would look like
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Jun 16, 2015
I have a form which users can toggle whether they want to only see entries that has data in a certain field. Previously I have set up a separate query with a hardcoded 'Is Not Null' in the criteria, and set the form to call the different queries based on the status of a toggle button. This time there is 22 queries that need to be modified so I'm hoping there's a better way.
I have a hidden textbox on my form that has value "Is Not Null" or Null based on the position of the toggle button.
In my query for the field criteria I have [Forms]![MainForm].[txtCriteria] where txtCriteria is the textbox previously mentioned.
When I run the query no data is shown.
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Mar 29, 2015
I had an issue with writing LIKE statements in query criteria yesterday [URL]....
The answer they gave worked perfectly when I only used a single table in the query. But as soon as I did an INNER JOIN with two other tables, now I get parameter value prompts when I open frmSearch, and instead of seeing ALL my records when the controls are left null, I get only the first record in the table.
Here's the SQL of the query, can you point out what I messed up? NOTE that this SQL was 'written' by Access.. as I used the Query builder to set all the 'Like or Is Null' statements, then clicked SQL and sorta formatted the code so I can see what I'm looking at (instead of superthick wall-o-code):
Code:
SELECT tblPeople.name, tblPeople.num
FROM (tblPeople INNER JOIN tblAddresses ON tblPeople.name = tblAddresses.name)
INNER JOIN tblPets ON tblPeople.name = tblPets.name
[code]....
Basically, this is a searchable database of participants in a pet-adoption program, along with the participants' pets history and address history (hence the linked tables as opposed to additional columns in one single table for pets and addresses... there are more than one in some cases). The frmSearch allows a person to run quick searches based upon ANY item in the database, such as name, pets, addresses, pet age, pet type, county of residence, etc. I need to be able to pick ANY field on frmSearch and type a value, and have the qrySearch return records for ANY record's related column wherein any part of it matches what I typed.
The statements as written worked PERFECTLY right up until I added the INNER JOIN. Now I get a set of parameter value prompts for every field on frmSearch that's referenced in the SQL for EACH table I linked to tblPeople, and if I leave everything null and click Search, I want to see EVERY person, but I'm only seeing the very FIRST person in tblPeople.
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May 7, 2013
In Access 2010, I'm writing VBA code that assigns an ADO dataset as the recordsource for a form. The query itself varies and is constructed from a search term typed in a textbox by the user. The code below works perfectly until the dataset is empty, when no records satisfied the WHERE criteria. In that case, there is a very long pause (presumably a timeout?) and I eventually get the error message "ODBC call failed." I tried to get around this by testing the number of records in the dataset (see toward the end) before assigning it, but it makes no difference in the behavior, so I'm thinking the actual assignment isn't the issue ... something else is.
If it matters, the "FROM qry_beneficial_owners" in this case is predefined query local to my Access db. That query is based on a linked view from a SQL server.
Code:
Public Sub RunSearch(SearchTerm As String)
Dim cn As ADODB.Connection
Dim rs As ADODB.Recordset
Dim sql As String
Dim cols As String
cols = "[acct], [acctname], [planid]"
[Code] ....
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Apr 13, 2014
I have a search form that has 8 criteria fields, of which the user can fill (from combo boxes and txt boxes) any number of them to narrow or widen the search.This by the way works perfectly. What I want to have is a message box pop up if the user does not enter any criteria and click search.
I tried stringing multiple if isnull statements together but realised that because I have an onload function that sets all fields to "" the isnull function won't work, so have changed this to the Len function.But when I run it, it just skips straight past the len line and opens the search detail form regardless. I suspect I have the order of things wrong, as it does not throw up any errors when run.
Code:
Private Sub Form_Load()
Me.PCNumberIn.Value = ""
Me.SerialNumberIn.Value = ""
Me.DeviceTypeIn.Value = ""
Me.DeviceModelIn.Value = ""
[code]...
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Jan 8, 2007
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
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Oct 29, 2014
I have 2 form controls one a combobox and the other a text box. The text box select the site (txtLocation) where the user can enter part of the name of the site and all sites with those characters are returned. I've done this by adding:
Code:
Like [Forms]![frmSearchDB2]![txtLocation] & "*"
into the criteria on the Site field in the query design editor.I also want the combobox to have an affect on the query. I want it to query on user status. However if the combobox reads "All Users" I want it to return all status's and all null values. In the criteria field I put:
Code:
iif([Forms]![frmSearchDB2]![cbxUserStatus] = "All Users",like "*",[Forms]![frmSearchDB2]![cbxUserStatus])
It kind of works but no null values are pulled back. Should it be an expression?Do I need to do it in VBA?
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Feb 26, 2014
I have a table listing about 20 elements as field names eg FE, CR, NI, TI and so on.
I have built a form which has a combo box listing these elements by selecting "fields" in the property settings of the combo box & next to this combo box i have 2 text box's where the user can input Min & Max values to pass on to the query.
E.g., FE (chosen from the combo box) value between (Text box1) and Text box 2.
I can run the query to give me values between the 2 text box's by using the following formula in the criteria (Between textbox1 and textbox 2).
The issue i have is to be able to select the element from the listbox, input the min & max values identified and be able to pass this to a query so the query can filter based on the field and values passed?
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Jul 22, 2014
I have a form (DropDown form) that has 3 drop down fields, you select your values from the drop downs and you would push a command button that runs an event procedure which runs a query (DropDown qry test). The user should have the option of picking any combination of fields to filter by. Or no combination, which would return all values in all fields. So I am basically using the form as parameter's for the query.
The problem I'm having is that my query is returning values for one field AND values for another field. Even if the other values selected are not in the same record. It's not combining the fields together to filter. For example: you pick a Project name and Supplier name, the query will return records that have the project name you selected but it will also return records with the supplier name you selected that have a different project name.
I've attached screen shots of the form and the design view of the query (the screen shot cut off the last column name. It is meant to say "Expr3: [Forms]![DropDown form]![Combo7]").
Using Windows 7,
Access 2010
Is there a way to select multiple values from the drop downs?
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Sep 12, 2007
i have checked the forums and i know they kind of answer this question, but im not really sure where i am ment to write it!
I have two queries, which a third query subtracts the 1st query and 2nd query values and gives the end value. If the 2nd value is null, i get a null value at the end, as i need to change this to zero instead. i know i need to use nz (as seen in microsoft access help, and other places on this forum) but im not sure exactly where to put this on my query, and in which query.
Basically:
(qryCountpartNo.CountPartCode)-(qryTotalquantityallocated.sumofquantity) = qryTotalFree
both countpartcode and sumofquantity may be null at any time
Any help would be greatly appreciated!
Thanks in advance,
Emily
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Jun 23, 2006
I currently have a form to manage inventory. On the left side of the form, I have a list box that shows all of the items in the database and finds the record on the form based on the selection.
I would like to have toggle boxes or something underneath the list box that when clicked will sort the box by vendor and item and another that when clicked will sort the list by part number and then select the record on the form based on the selection at that time.
I have no idea how to accomplish this...can anyone help?
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Mar 20, 2013
I have a form which uses a parameter based query to present an individual senior doctor with a list of names for of individual juniors to provide an assessment report on. When the first form opens the user enters their RespondentID.
Once senior has decided which names to comment on I have another form which has the questions to be answered which is opened by clicking a button on the first form.
How can I pass a parameter from the first form to the second so that only the records relevant to that senior doctor are displayed? The underlying table has 60 senior doctors and 20 junior doctors. The senior doctor is identified by the field RespondentID in the first form. I've tried putting a WhereClause in the FormOpen command but I still get a dialogue box asking for the parameter RespondentID when the second form is opened.
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Apr 24, 2006
Hi there, instead of blank fields in my crosstab query, and hence my report, i would like a standard comment, such as 'No Booking'.
My crosstab is something like this:
.........A...........B..............C............. D
1.......X
2.......X..........................X
3...................X............................. .X
(Ignore the dots, obviously)
Currently, when i try to open the report based on this query, it fails unless each column has data in it for at least one record.
I've tried using the Nz function but haven't been able to make it work. Thankyou in advance! :)
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Apr 1, 2013
I have a table with two fields; Part and remarks - both Text fields containing 1.8 million records. Remarks field has 600,000 blanks in the field. I filtered for blanks to get the 600,000 records displayed. I want to update this field to N/A where null values exist. My code is
UPDATE PartApplications SET PartApplications.remarks = "N/A"
WHERE (((PartApplications.remarks) Is Null));
The query updates 55,000 records ONLY and leaves the remaining blank.WHY would all null values not get updated?
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Aug 29, 2014
I'm using Access 2010. I need to calculate a score based on values selected in a table by looking up corresponding values in other tables. I have a "Project" form to create new entries into the Project table (see Table 1). When I create a new project record, I will select values for the Payback and Need fields by selecting options from a list. The Payback list is pointed at Table 2 and the Need list is pointed at Table 3. In the below example, I created the "ABC" project and selected "1 year" for the Payback field and "Repair" for the Need field. Pretty simple.
Now that I have the "ABC" project loaded to my Project table, I'd like to create a report that will show a "score" for this project. The score should be calculated as follows: Payback Impact + Need Impact. In this example, the score should be 30 (Payback Impact of 20 + Need Impact of 10).
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Mar 22, 2006
Hi all,
stuck on this, not sure if it can be resolved....
I have a parameter query for which the parameter is based on a form field entry (i wanted to avoid the dialog box popping up).
No problems with this....however, I want to create a chart based on the same query however, i get the following error message because it does not recognise the query parameter.
Error Message: The Microsoft Jet database engine does not recognise '[Forms]![frmChooseDTDate]!DateOccured' as a valid field name or expression.
Can this be resolved?
Help most appreciated!
regards to all
K
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Sep 24, 2013
I have a form with a textbox, where one inputs a number and then I run a query with the form criteria. The query is
Code:
Select Blah blah from dbo_temp where A>textbox value OR B>textbox value OR C>textbox value OR D>textbox value
The columns which are linked to the textbox some times contain null values. So, A, B, C, D columns do contain null values.
The expression in the "Criteria" column of Columns A, B, C, D (all on different lines - to make sure OR criteria is fullfilled) is as follows
Code:
>IIf(IsNull([Forms]![MainForm]![Criteria]),-100,[Forms]![MainForm]![Criteria])
I've put in -100 as an arbitrary never possible number. Obviously, this does not return Null values.
Question: How can I return both Null & Numbers when the Textbox in the form is left blank? in all the columns. Currently, I am not getting Null values
Code:
>IIf(IsNull([Forms]![MainForm]![Criteria]),SHOW ME EVERYTHING INCLUDING NULL VALUES & NON-NULL NUMBERS,[Forms]![Material Finder]![txtPS])
or in other words
If the textbox is blank, show me all the data available, else if it is not blank then show me only the values that are greater than the number entered in the textbox from within column A, B, C, D ....
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Sep 26, 2014
i have 2 tables that i am linking on a field that matches with null values on both tables but it either pulls nothing or when i put a right join pulls just one tables data.
i have also confirmed both are pulling from the same data source, so no issues with field properties and confirmed they are null values in each field within both tables.
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Sep 2, 2014
My db contains an unlinked form that is used to append records to 1-3 separate tables (tests to see if master records exists, appends if needed, moves on to child records). One of the fields is a text field meant for notes. The VBA errors out whenever this text contains apostrophes or quotes.
Is there a simple way to recall the string field with quotes and apostrophes intact and append it, or will I have to validate and remove them from the string?
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