I'm building a query that I'll use in a form to display a list of employees. On my form I have two comboboxes, one to filter the query by end date and one to filter by status.
The source table for the query has a Boolean field (a Yes/No field) which designates whether the employee is available or not, hence the combo to filter by status. I've run into the issue of how to use non-Boolean combo options but still have the query critera be Boolean.
I know that to use a combobox as a criteria I use this syntax: [Forms]![Form1]![Combo4], but since my combo options are "In Training" and "Available" I don't know how to convert the criteria to Boolean... is this even possible?
Example
If my user selects "In Training" from the combo (which would be equal to False on the source table), my query should use False as the criteria for that field.
After searching Google for an hour without any luck, I'm guessing this may not be possible?
Use an IIf expression to transform the combo's text value to Boolean.
IIf([Forms]![Form1]![Combo4] = "Available", True, False)
Note I assumed you want True when the combo's value is "Available" and False for anything else. If the possibilities are more complex, you could use a Switch expression to assign the correct Boolean for each possible combo value ... or use a lookup table which maps between the two.
Related
I'm trying to make a MS Access report, where I use a text box to display a field value, then have another text box indicating if the first value is higher or lower than an entry in a separate table.
The report has a record source of "Table 1", and a textbox named "txt_Value1" which displays the number in Field: "Value1". I have a second table, "Customer_Criteria" which has a field "PassValue" that I want to compare against. My expression builder statement is:
IIf([txt_Value1]<(DLookUp("[PassValue]","[Customer_Criteria]","[Customer] = 'ABC'")),"TRUE","FALSE")
This statement always returns false, regardless of what the correct logical result is.
I've tested it, writing:
IIf(1<(DLookUp("[PassValue]","[Customer_Criteria]","[Customer] = 'ABC'")),"TRUE","FALSE")
And I get the correct results. Also, if I write:
IIf([txt_Value1]< 1,"TRUE","FALSE")
I get the correct results. What am I missing to compare the textbox value vs. the Dlookup?
As I understand, both fields are numeric. Access may consider those fields as text, so for correct comparing use type conversion.
Try this:
IIf(CLng(Nz([txt_Value1],0))< _
CLng(Nz(DLookUp("[PassValue]","[Customer_Criteria]","[Customer] = 'ABC'"),0)), _
"TRUE","FALSE")
Nz required if fields may contain NULL values, in this case type conversion function will return error.
Good day
I have a SSRS report that has 4 filters.
One of the 4 filters is a "Search Parameter".
When the user uses the "Search Parameter" (field/filter, types something in), I want to ignore the other three filters despite them having values or not.
I've tried CASE/SWITCH statements in the Expression of the Parameter (DataSet Properties), but no luck.
Does anyone have an idea on how I can get this done
The Filter is quick and convenient but only allows AND relationships between the filter criteria and you want an OR relationship here.
The good news is that you can make more complex filter logic by using expressions. We will create a boolean filter expression that evaluates to whether you want to filter the row or not and compare this to True.
Have only one filter criterion and click the expression editor button. Make the expression something like:
=IIF(IsNothing(Parameters!SearchParameter.Value), Fields!Field1.Value = Parameters!Field1Parameter AND Fields!Field2.Value = Parameters!Field2Parameter AND Fields!Field3.Value = Parameters!Field3Parameter, Fields!SearchField.Value LIKE "*" & Parameters!SearchParameter.Value & "*")
Make the expression type be Boolean, the Operator = and the Value True.
I have a query that returns a fluid # of records, depending on criteria selected in the form. I would like to display the total # of records returned to the form.
I have added a unbound text field to the footer in the form that is displaying the controls and resulting records. I tried the following expressions in the text field, both of which result in #error:
=Count([qrnname]![fieldtocount])
=DCount([qrnname]![fieldtocount])
This should be simple.
DCount requires string values for its arguments. Assuming fieldtocount is the name of a field returned by the named query qrnname, use this as your text box's Control Source ...
=DCount("[fieldtocount]", "qrnname")
Since that query depends on criteria selected in the form, Requery the text box whenever those criteria change to update the count displayed in the text box.
use this =DCount([fieldtocount]![qrnname])
The syntax for the DCount function is:
DCount ( expression, domain, [criteria] )
expression is the field that you use to count the number of records.
domain is the set of records. This can be a table or a query name.
criteria is optional. It is the WHERE clause to apply to the domain.
Dcount in detail
An other alternative is to use =Count(primaryKey) in the Control Source property
It seems better if you have some filter on your original query, so you don't have to apply them again in the DCount (expression, domain, [criteria]) function.
A quick method for counting Access records in a form
I am working with SSRS and have a tablix that needs certain rows excluded if a value in a multi-value parameter is not selected. For example, the multi-value parameter is 'Include Loss' and the values are 'Yes' and 'No'.
So if the user selects 'No', then I want the tablix to exclude rows where Description field is equal to the text "Loss Transaction".
I am trying to write an expression to filter on the tablix as follows, but having no luck.
=IIF(Parameters!IncludeLoss.Value="N", Fields!Description.Value, NOTHING)
and use '<>' for the 'Operator' and then:
="Loss Transaction"
I get the error 'Failed to evaluate the FilterValue of the Tablix'. Any suggestions? Thanks in advance!
Filters have an implicit AND relationship - that is, all the conditions have to be True for the filter to take effect.
Accordingly, you can have two filter conditions set:
=Parameters!IncludeLoss.Value is equal to N (add a second condition)
=Fields!Description.Value is equal to ="Loss Transaction"
Alternatively, for complex conditions (or conditions involving OR or Null which aren't supported in a standard filter) you can just use one condition and set that condition's expression to something more complex that evaluates to a boolean and test that against True. For example:
=Parameters!IncludeLoss.Value = "N" AND Fields!Description.Value = "Loss Transaction"
I have a multi value parameter in my SSRS Report. I want to find out whether (Select All) is checked in that parameter.
In other words, whether all the values in the parameter are checked or only some values are checked.
Is it possible?
I am able to find out number of selected values through Parameters!Parameter.Count. Is there a way to find out total of items in that parameter?
In case anyone is still having issues doing this, I just coded this easy fix.
=IIF(COUNTROWS("dataset").Equals(Parameters!parameter.Count),"it is equal","this is not equal")
For the specific use-case of showing the selected filter on your report in a textbox, here's the expression that will show "All" if "(Select All)" is selected, otherwise it will show all the selected values as a comma-separated list:
=IIF(
Parameters!YourMultivalueParam.Count = countrows("YourDataset"),
"All",
Join(Parameters!YourMultivalueParam.Label,", ")
)
(split onto multiple lines for readability)
countrows reference: https://technet.microsoft.com/en-us/library/dd255215.aspx
Credit to other answers, just want to extend them for this common scenario.
Your approach sounds good: I would make the options for the parameter come from a dataset.
Then you can use =COUNTROWS("DataSetName") to return the total number of options for your parameter and compare this with Parameters!*Parameter*.Count as you suggest.
I also faced this problem and I solved it this way.
I have one multivalued parameter named "Carrier". Then I have added one parameter "CarrierHidden" which is same as "Carrier" only thing is I made its Visibility as Hidden.
="Carrier=" & Switch(Parameters!CarrierHidden.Count = Parameters!Carrier.Count, "All",
Parameters!Carrier.Count > 1 And Parameters!CarrierHidden.Count > Parameters!Carrier.Count, "Multi",
Parameters!Carrier.Count = 1, Parameters!Carrier.Label(0))
The easy way will be to count the number of the selected parameters and compare them to the dataset
=IIF(Parameters!company_number.Count = CountRows("Dataset1"), True, False)
The problem is if you're trying to pull something for another data set then cross referencing the row count in another dataset won't work. You will have to go with what the previous post states. Create an internal parameter of the exact type and assign the default value to the entire dataset. That way you have the max count of the rows since the hidden parameter.count = rowscount. That way you can use it within another dataset also provided that dataset is AFTER the first one is populated.
According to Microsoft's SSRS help search:
=Parameters!<ParameterName>.Count
Returns the integer value 1. For a single-value parameter, the count is always 1.
I verified this does indeed work, check the integer returned for the built-in parameter count field.
Allow multiple values on a parameter selection. Checking the value of the above field will let you know how many values the user actually chose.
In my situation, I allow multiple values on company number. This gives users the ability to choose one company to report on or several at once. Per client request, if they choose more than one, display data horizontally. If only one company is chosen in the parameter list, show the data vertically and hide the other tablix.
So my visibility show or hide expression looks like this in the one tablix:
=IIF(Parameters!company_number.Count > 1, True, False)
and like this in the other:
=IIF(Parameters!company_number.Count = 1,True,False)