Queries :: Calculating Percentage - Exclude Null Values From Expression
Mar 10, 2014
I'm trying to create an expression to calculate percentage.
The fields, Value A and Value B might both have null values, but I do not want Access to treat nulls as zero (as in the Nz() fn). How do I get the expression to exclude any nulls and not calculate for those rows, but set the calculated value for a row with null A or B to zero.
I want it to set no calculated value to zero so I don't get overflow errors and can therefore order the data by the calculated field.
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Dec 21, 2004
I have made a query from a table to count something.
Now, I dont know how to exclude the null value to the new query.
example:
Query Name: School
Field: Sch_No, Sch_Name, Subject1, Sum1, Subject2, Sum2, Subject3, Sum3, Subject4, Sum4, Subject5, Sum5
After run this query, there is a field(Subject4) has a null value.
Before I make a nice report, I have to exclude Subject4 & Sum4. And this will make Subject5 the fourth subject without displaying Subject4 & Sum4.
I hope anybody can help me..i dont know how
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Apr 4, 2014
I am trying to use the expression below to transpose strings of 4-6 numbers (140504) to a string of 8 numbers with "20" in front (20140504). Some of the [Receive_Date] fields are empty or are 0, and in those cases, I need the expression to return a null value.
New_Receive_Date: IIf([Receive_Date]=0,"",IIf([Receive_Date]="","",Format([Receive_Date_YMD],"000000")+20000000))
The Format(...) part of the expression works fine on its own, but I am new to dealing with null values in my expressions, and when I add the rest of the expression, all '#Error' values are returned.
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Oct 1, 2014
I have a table with the following fields; Row; AnimalID; Weight: Date_Weighed (see attached screenshot example).
I would like to make a query that gives me the percentage weight loss/gain since the last time a particular animal was weighed. For example, animal AAA gained 100% between 2014/01/01 and 2014/02/01. Animal CCC gained 0% between 2014/02/01 and 2014/03/01.
I plan to use this to create a pop-up that informs me if an animal had lost over 15% of its bodyweight since the last time it was weighed, indicating either a loss of body condition, or that a female has given birth.
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Feb 24, 2012
I am using workdays to calculate time passed between two dates. I also have a table for Holidays that I don't want counted as work days. This is working well, but I would like my queries to show a null value instead of showing #Error when a date field is empty. Here is my coding in my Module.
Option Compare Database
Option Explicit
Public Function Workdays(ByRef startDate As Date, _
ByRef endDate As Date, _
Optional ByVal strHolidays As String = "Holidays" _
) As Integer
[code]....
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Aug 16, 2006
Hi. I am using Expression Builder to total 3 columns for a query.
Total: [BaseTotal]+[ClickTotal]+[Adj Total]
The [Adj Total] is sometimes empty, and when this happens, Total is empty even though there are values for [BaseTotal] & [ClickTotal]. How can I make the Total show up regardless of whether any of the three items used to calculate it are Null?
Thanks
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Dec 19, 2014
In Expression Builder, I have the query(in the Criteria row) set to run based on values in different fields on a form. When one of the fields is empty however, the query will not return any records.
How can tell Access to ignore the fields when those fields on the form are empty and only look at fields that are not null.
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Oct 2, 2014
My training database requires me to identify each training record in the tblEmpTrainHist table as either "Compliant" or "Delinquent". I thought a simple calculation in my query:
RecordStatus: IIF([DateReceived]<=[DateDue],"Compliant","Delinquent")
would do the trick. However, I did not consider the records where the employee has not yet completed the training and the field [DateReceived] is Null. There are two considerations: those employees who have no [DateReceived], but have not yet reached the DateDue (Compliant); and those employees who have exceeded the DateDue (Delinquent).
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Mar 28, 2015
I've can do this on excel but don't know how in Access. I'm calculating bonuses. My table has salaries, and my query simply multiples each salary amount by a % to get the bonus amount. But I need to calculate adjustments to the bonuses using the sum total of the bonuses my query calculated:
Salary (from table) Bonus (calc'd by query) Adjustment (to be calced)
100,000 1,000 Sum of total bonuses/salary*4%
90,000 900
How do I capture the total of my calculated bonus column to use to calculate the adjustments in my right-most column?
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Apr 8, 2014
I work at a program where we have individuals try out for a field (coming from various backgrounds). The program has been in place since 2012, and I wanted to start looking at the data for analysis and comparing trends, etc; I imported our master file (excel) into Access. It's in one big table, column headings include roster number, name, gender, type, FY (fiscal year), and finalcode (Select, Non-Select - but put it in as 1 or 2 in the field)).
I created a query, and was able to get data I was looking for.I then set it to Pivot Chart (bar graph).
Bottom (Believe its X) Axis: I have Type, Year.
Right Side of Chart (TypeCodeNumber)
Top of Chart: Count of CodeNumber
It gives me the totals (whether select or non-select) just fine, but I have been racking my brains, watched tons of YouTube videos and read a lot on how to make it give me a percent. I found a way to go Percent on the left side of the bar chart, but the Values go up to say 3300%. I know the problem is with the Count up top.
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Aug 14, 2014
I have an expression in my query and i'd like to return a value of 0 is the expression yields a null value. Here is the expression i have:
IsNull(Sum(([qryTime].[hours]*[Rate])+([qryTime].[minutes]*[Rate]/60)+([qryTime].[seconds]*[qryTime].[Rate]/3600),0)
I'm getting an error "the expression you entered has a function containing the wrong number of arguments". How can i resolve this?
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Aug 12, 2015
I have a query that must calculate the different between values in two different records, based on the date.
The underlying ORIGVALUES table contains:
Date; Value; Diff
1/10/15; 100; (this is what I am trying to calc)
1/11/15; 101; (this is what I am trying to calc)
1/14/15; 102; (this is what I am trying to calc)
What is the best way to have each record calculate the selected date value divided by the prior date value)? E.g.
For 1/11 the math is 101 / 100 (so the 1/11/15 record would show the result of 1.01)
For 1/14 the math is 102 / 101 (1/11 to 1/14 represents a weekend)
I could copy the prior day values to the current day records and do that math easily but that is very redundant.
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Jul 6, 2012
I'm guessing it's a syntax problem.
This one doesn't give me an error, its just blank:
=Count("[QueryName]![QueryField]='String'")
This one gives me an Error. It's supposed to calculate a percentage. [ReportField] is working properly:
=[ReportField]/Sum([QueryName]![QueryField])
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Jan 2, 2014
I have created a link to a CRM system that we have, and am using access as an interface for a specific task with the data contained within this CRM.
I have written a query that pulls to fields of data together but cannot get the two to calculate.
Within SQL server management studio I use the following query to give me a numerical response.
SELECTPRCPRICE,SUM(CAST(VL2BENEFICIALASNUMERIC (20,6))*CAST(PRCPRICEAS MONEY)))ASHOLDINGVALUE
Access doesn't appear to accept the cast functionality / how I can perform a similar functionality with access?
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Jun 16, 2013
I am trying to work out the expression that will first count the number of 'Yes' returns in a series of yes/no boxes and then display as a percentage.
To explain...The yes/no boxes represent attendance over a 20 lesson course. I have added a count for each lesson for student attendance..(grouping them in the footer) but I would like to add the number of attendance for each student.
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Oct 24, 2007
Hello All,
I am not sure what I am doing wrong. I am trying to get a percentage of two numbers and the expression is not comming out right. This is the expression:
Expr1: [Ontime PU.CountOfP Performance]-[Late PU.CountOfP Performance]/[Ontime PU.CountOfP Performance]
Here is what it should do:
1242-68/1242=0.94524959742351046698872785829308 (which would be 95%)
For reason it is not doing this?????
Any Ideas????
Thanks
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Jan 22, 2005
For several days now, I have been trying to write an expression, in a report, to get a percentage. I am new to Access so I don't completely get it yet. This is the expression I wrote (only works sometimes):
=[pathjbo50]/([pathjbo50]+[pathcol50]+[pathpp50])
This expression only works when all the fields are populated. If any of the fields are empty, I get nothing.
Please help!
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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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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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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 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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Jan 20, 2005
I created the following expression on a report, under the details, in a text box:
=nz(pathjbo50,0)/nz(pathjbo50,0)+nz(pathcol50,0)+nz(pathpp50,0)+nz( pathlm50,0)
what I want is to find out what percentage pathjbo50 is of the sum of the other 4 fields.
but I keep getting an "Error" message. How do I get this percentage?
Where is the best place to find literature on writting expressions?
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Jun 30, 2015
How to write an expression/criteria in a query that will return only ID numbers with alpha numeric values. Example: My Id field contains both numeric 479621, 680530 and alpha numeric 132NAV100, 174NAV26a values. I want to run the query to return only the alpha numeric values.
I do not know SQL nor VBA.
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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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Jun 26, 2007
I'm having a problem with queries, and I can't seem to find a solution in books - I looked through about ten of them and none of them addressed the problem. This may be because it has a painfully obvious solution...
A little background:
I am designing a database for a debt-collection law firm. One of the functions it must have is to keep track of various different sorts of financial transactions which can pertain to a given debtor (ie, a received payment, a cost expended, and a few other things).
The problem is that, in generating reports, I need to use queries to find several sums of only those transactions which fall into specific categories (for instance, to calculate the amount a debtor has paid against his balance, it needs to sum only those entries which are both linked to that debtor's ID number and whose type field reads "payment", and then subtract from that those entries whose type field reads "cost"). The problem is this: not all debtors may have "costs" entries, and when there are none, the report comes up blank with a single "#Error" written in the name field and nothing else present.
I believe the problem is that the Sum aggregate is returning a null value when the query finds nothing that meets the criteria. I have been unable to find a way around this; the Nz() and IIf() with IsNull() functions don't seem to be helping.
The query runs as intended when there are entries for every relevant type; however, it is undesired to have to enter a "payment" of $0, "cost" of $0 etc for every entry just so that this function works.
Is there anything I can do about this? Any input would be appreciated, as I'm fairly inexperienced with the use of Office Access. (If it matters, I am using Office 2003).
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