Queries :: Calculating With Null Fields In A Query
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 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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May 22, 2013
Access 2010. I've had to learn it at work because our DBA was let go and I was the only one willing to give it a go. Read a book or two and picked up some stuff on the internet.
Here's my problem:
I have a simple table -Employee with 4 fields. FirstName, LastName, Office and JobTitle. I have form called Form1 that has 3 control fields cboJobTitle (a combo box that is populated by a query that finds all the unique values of that field in the Employee table), cboOffice (same as above) and txtName (a text box to allow user input) that are used as the criteria for a multi-field query triggered by a button at the bottom of the form. The idea being that you could do a search using this form to find all the employees in one office or all the accountants in one office, or any other combination.
The main search query has the following criteria for each field -
Like [forms]![Form1]![cboOffice] & "*"
Like [forms]![Form1]![cboJobTitle] & "*"
Like [forms]![Form1]![txtName] & "*"
It works great...until I enter a record where one of those fields may be null, such as if I leave the JobTitle blank.
If I have two employees in an office in one city and then do a search for all the employees in that office, it only returns one record and ignores the one that has the null value in the JobTitle field.
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Sep 6, 2005
Morning All,
Just wondering.
When a form needs a calculated field. Say something simple, like
TotalCost = Quan*Cost
Is it better to create a query?
Use a table and create the calculated field in the query builder?
Or use a table and create a new unbound field on the form with the formula in it?
I never really know which one to do.
Lately I’ve been using saved queries for almost everything and now I have several dozen in this data base and its only half way done. Soon I’ll have to create a data base just to keep track of the queries in this one.
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Apr 24, 2013
I have created a make table query and using expressions for two of the fields. I have set the field properties (format) to "Percent". The expressions are calculating rates based on two other fields. The expressions are currently as such:
PTD_CM_PGM_RATE: IIf((IsError([PTD_CM_REPT_PGM]/[PTD_CM_REPT_ER])),"0%",[PTD_CM_REPT_PGM]/[PTD_CM_REPT_ER])
I'm using the IIF function to avoid potential errors should one or both of the values ("PTD_CM_REPT_PGM" or "PTD_CM_REPT_ER") be zero.
However, when running the query, I am getting the "...type conversion failure is caused when the data in one or more fields doesn't match...." error.
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Jul 30, 2007
I've imported an Excel file into a table and now I've created a Query from it.
I now need to Add Fields (names are not in the table) and calculate totals for these renamed fields some of the answers are going to be the result of two or three fields.
Any help would be greatly appreciated.
thanks
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Mar 17, 2014
I am looking to collate marketing data from different areas of our DB into a Marketing Hub. We have to collect various feedback at different times, if a client on a programme completes a course, they give feedback for that course.13 weeks after a client completes the programme we have to get them to complete a destination survey. On both these forms it asks would they be interested in doing any more courses. This data is then stored in the Courses table and Projects table respectively.
I want to create a query to become the record set for a new form which only shows those students that have stated they would be interested in doing other courses.Five of the options or Yes/No fields, and one is a text field (which courses, other essentially).How does one do a query that only shows records where any one of 6 fields is not null?
Code:
SELECT Students.ID, Students.[First Name], Students.[Last Name], Courses.[Sage Accounts], Courses.[Sage Payroll], Courses.[First Aid], Courses.[Food Hygiene], Courses.[CV Services], Courses.[Interview Skills], Courses.[Which Courses]
FROM Students INNER JOIN Courses ON Students.ID = Courses.ID;
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Jun 12, 2013
I have a query that performs some calculations, these calculations feed into another query and produce a final value. If there are no null values everything works perfectly. But when there are null values, I get errors.
What I have tried:
1) I tried to implement the Nz function for each field of the formula that is not calculated but from user input.
2) I tried to implement the Nz function for just the field that calculated the last result before feeding into the next query, but it didn't show the 0 value I gave.
3) I tried to use UPDATE TABLE SET in SQL, but I don't think I was using it right. I tried to use it for all records but always got an error when it ran.
The first two above result in showing no values at all, even if there are some. The third didn't work. How to easily update null values in the query to 0? All I could think of was to somehow use Criteria or SQL.
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May 16, 2013
I am trying to create a clean database and code to generate a report.
I am trying to count the number of null fields in one of my queries:
However, because of this expression, I cannot carry other fields with it. So the end result looks like:
But I would really like it to spit out the following information:
Total Not Fixed: 241
Department: Sustaining Eng
is there a way to create an SQL query to simply add data: I have tried the following:
Code:
ALTER TABLE qrySustainingEngNotFixed2 ADD Dept TEXT(25)
Insert Into qrySustainingEngNotFixed2 (Dept) Values (Sustaining Eng)
SELECT TotalNotFixed, Dept
FROM qrySustainingEngNotFixed2;
The above isn't working. Keep in mind that I want this is just for display purposes. I pondered making a custom table and then making a Union Query, but I'm trying to do this all in one SQL statement.
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May 22, 2015
I have a query which returns, among other things, a number of boolean fields. In some cases, there will be a genuine True or False value in each of these fields; in others, it can and should be Null (e.g. as a result of a 'failed' LEFT JOIN of some description, where there is no associated record in the joined table which fulfills the criteria)
So something like this :
Code:
SELECT [tblTable2].[fldBooleanField]....
FROM [tblTable1]
LEFT JOIN [tblTable2]
ON [tblTable1].[SomeID] = [tblTable2].[SomeID]
However, I will be writing the result of the query to a text file and here's the problem. I want to show a numeric value for a genuine True / False (i.e. -1 and 0 respectively using the standard boolean conversions in Access) and a blank for any Null values.
So I tried this :
Code:
SELECT CInt([tblTable2].[fldBooleanField]) AS fldBooleanField....
FROM [tblTable1]
LEFT JOIN [tblTable2]
ON [tblTable1].[SomeID] = [tblTable2].[SomeID]
However, currently when I look at the exported recordset in Notepad, I am getting 0's for both False and Null values (and -1 for True)
How I can adapt my query to keep Nulls...null? And convert the genuinely present boolean values to integer form?
Only thing I can think of is to use (untested) :
Code:
IIf([tblTable2].[fldBooleanField] Is Null, Null, CInt([tblTable2].[fldBooleanField]))
But there's a number of boolean fields in there, all requiring the same treatment.
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Apr 26, 2006
Hi,
I have 2 tables... one with 'answers' (on questions) and one with these 'questions'.
Now I want to show the questions with their answers on a rapport
(based on a query) .. but only these whereby the answer-field is NOT NULL..
So I have already:
ansques1: IIf([answers.1] Is Null;Null;[questions.1]+" "+[questions.1])
But now if the answer-field is NULL, then the ansques-field is also NULL...
I want if the answer-field is NULL, to have no new field.. like ansques1.. just want to leave it out of the query... can someone help me with this?
Thanks in advance,
Ankie
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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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Jun 26, 2013
Is there a way to calculate three different rolling averages in one query?
I just inherited a database where someone is using three queries to capture the same information only with different time frames. They were calculating a rolling three month average, six month average, and twelve month average. I would like to combine these queries into one to reduce time spent running reports from the database. All three queries are based on one table. One of the columns in that table is called "Month Start Date". That field shows the first day of the month when a call was entered. I can get the query to tell me the first month in the three month period and the first month in the six month period, but I can't get it to calculate the averages of the calls that fall in those time frames. Here is the SQL for the query I have now. When I try to run this, I get the error message that my formula is not part of an aggregate function.
Code:
SELECT DISTINCT DateAdd('m','-2',(Max([Month Start Date]))) AS ThreeMonthStartDate, DateAdd('m','-5',(Max([Month Start Date]))) AS SixMonthStartDate, Max([Month Start Date]) AS MaxStartDate, IIf([Month Start Date] Between [ThreeMonthStartDate] And [MaxStartDate],Avg([All Call Rate]),' ') AS ThreeMonthAverageCallRate, LIST_WITH_TNC.Device, LIST_WITH_TNC.Model, LIST_WITH_TNC.[Item Num]
FROM LIST_WITH_TNC;
Is there a way to make this work?
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Apr 17, 2015
I have been working on a stock database for my company. It needs to hold stock data, Any adjustments in the storesperson may do (QtyIn or Out). And allow Customer PO's to be raised (just to show prices and quantites sold to customers)
I have 4 Tables:
tblStockList
PartNumber (Primary Key)
Description
Location
StockCheck
StockListUnitPrice
[code]....
I then want to create a query to work out the total stock.
At the moment i have two queries, one to Sum the adjustments and one to sum the PO's. (The stock is not removed from the Customer PO until invidual line is shipped)
I then need to combine both these queries to work out the total stock value.
There will always be a value in the Sum of Adjustments but not in the Customer PO. So when i run the query to =SumofAdjustments - SumofCustomerPO's, if there is no record in the SumOfCustomerPo's, no value will appear.
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May 2, 2013
I'm trying to make a query where it can calculate the difference between a table field value and a query field value.
Ex. Table INVOICE - fields
invoice no, invoice value,
Query TOTAL - fields
invoice no total invoice value
I need to get the difference between invoice value and total invoice value.
How can I put this into a query (invoice value - total invoice value)?
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Feb 18, 2015
I'm making a query that has the following Fields
Product (Table PDZRN1)
Whse (Table PDZRN1)
Description (Table PDZRN1)
On Hand (Table PDZRN1)
Unit Cost (Table PDZRN1)
Unit Price (Table PDZRN1)
LastDate: Date (Table Sales_History) (using the Max function)
Where I am stuck is I want 4 additional columns to pull the last 3 fiscal years and total sales for each Product for the 3 previous fiscal years. The Field with sales amount is "Sales" it is located in Table "Sales_History", and the dates for the invoices are in the field "Date". I tried the following query, but I'm sure it didn't work because I failed to push the data back to the date field:
Field - FY2013Sales: Sales
Table - Sales_History
Total - Sum
Criteria - <= 04/01/2012 and <= 03/31/2013
how to link my criteria back to the "Date" field, or if I'm even going down the write path.
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Jan 21, 2015
I don't use Access too often but I'm trying to connect a table to some business intelligence software I use.
A. Date B. Price C.Ydayprice
01/01/2015 101.45
02/01/2015 104.70
03/01/2015 103.00
Simple stuff. Once I've connected to the table, I can easily do what I want with Field 'Price' and 'Ydayprice'. However, I can't calculate column C. All I want is row 2 to say 101.45, R3 to say 104.7 etc. I've tried various things but I don't have the knowledge to write the action I require. I don't want to calculate the change in Access either.
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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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Jun 16, 2014
I am using the following UNION QUERY to total up equipment tested for a report.
SELECT "Laptops Tested" AS PCEQUIP, Count(*) AS RECORDS
FROM [LAPTOPS]
WHERE (((Date)Between [Enter Start Date] AND [Enter End Date]));
UNION
SELECT "Workstations Tested" AS PCEQUIP, Count(*) AS RECORDS
FROM [WORKSTATION]
[code]...
I have created a report using ACCESS 2000 for this union query and it satisfies the requirement. I am trying to add the proper code and syntax in this query to total the number of all of this equipment tested.In this case the total would be 86. Is this possible?
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Aug 5, 2014
I am trying to create a running total query that aggregates project funding by fiscal year. The fiscal year is calculated based on a date time field that is never null. The totals field comes from 2 different number fields that are either 0 or > 0. The query is going to be linked to by Excel, so I have to do the running total in the query itself, vs. a report.It is close to working, except that it is not totalling the first fiscal year. The output surrently looks like this:
FYear BudgetedCostIndCont Commitment
2010
2011 8585643 4742000 3843643
2012 2297116511432165 11539000
2013 3618726216963282 19223980
2014 4457769020706644 23871046
2015 4963815023206644 26431506
As you can see, the first row for FY 2010 is blank. I know there is data there, as this query is fed by a subquery that selects these rows based on contract signed date. Below is the SQL of each query:
Code:
SELECT Year([DateContractSigned])-IIf([DateContractSigned]<DateSerial(Year([DateContractSigned]),4,1),1,0)+1
AS FYearExport
FROM tblProject
GROUP BY Year([DateContractSigned])-IIf([DateContractSigned]<DateSerial(Year([DateContractSigned]),4,1),1,0)+1, tblProject.ProjID, tblProject.FPAccepted
HAVING (((tblProject.FPAccepted)=True));
and the Aggregate query:
Code:
SELECT qryDashboardChart1.FYearExport,
DSum("[BudgetedCost]","tblProject","Year([DateContractSigned])<=" & [FyearExport]-1 & "")
AS RunTotBudgetedCost, ([RunTotBudgetedCost]-[RunTotTECTERRACommitment])
[code]....
I should also mention that I cannot implement the NZ() function, as Excel balks at this when trying to link to Access queries.
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Aug 16, 2007
I have a form which a user can select upto 3 different options to search the main database.
The main table has:
RVA Date
Council
Introducer
PS NO
Period
Asset Description
Current Cost
SSAP21
Position
The three fields the user can search on is:
Council
PS No.
Asset Description
I have created 3 individual queries to find the records for each of the above, as the other two choices could be left blank.
Not sure if one super query can be done to show the records based on the user input (as I say one or two choices could be left blank).
So far I have managed to get a main query (based on the 3 other queries) to work on all choices made by the user except Asset Description with the other two left blank.
I have made relationships between the three queries on the main query. Linking Council,PS No. & Asset Description to each other.
Almost there, just need the main query to work on the user selecting Asset Description only.....
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Mar 24, 2013
I am trying to do the good 'ol sales report (query) to include customers with no sales.
I have a customers table, account number table, sales table & sales (line) detail table. (all linked in that order)
If I run a query to show customers (in the customer table) with account numbers, that works
An unmatched query to show customer without an account number works (but of course the unmatched account number field isn't shown).
How can I get the two two be shown together with the "unmatched" having a null or 0 for their account number?
I am guessing in principle, the resulting solution can be modified to show customers without sales alongside those with sales?
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Jul 29, 2013
I have a form that feeds information to a query which in turn sets up a report. For clarity i will list out in basic terms what I have
Input Form
- Check Box to activate/De-activate a text field [chk-active]
- Text field for a parameter [txt-Parameter]
the query has a column that has null values from the originating table. These values will be added a t a later date, but need to be queried and reported at some business intervals.
In the query criteria for this column, I have the following Criteria
Like IIF([Forms]![ReportGenerator]![chk-Active]=0, "*", [Forms]![ReportGenerator]![txt-Parameter])[/I][/I]
I have tried for the last 5 hours to figure out how to write the formula to be able to get the blank entries to show up as well but have had no luck.
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Aug 4, 2005
I have two tables - Hours and Employees. Employees table has these fields:
EmpID, and First, and Last name.
Hours table has these fields:
EmpID, Hours, Funding Source, Nature of Work, Pay Period
I need to produce a report or a query that will display these results:
A column with a list of all the employees and all the Nature of Work categories going across with the sum of hours for each Nature of Work. I'm attaching an Excel spreadsheet that shows kind of what I need. Also, these reports need to be produced for each Funding Source and
Pay Period, so something like [Enter Funding Source] and [Enter Pay Period]
My question is that I don't know how to make a report that will just list a column with all the names and count the sum of hours for each Nature of Work.
Hope this is not too confusing, and any help would be greatly appreciated. thank you!
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Sep 25, 2006
Ohh Stress. Need Help....I have a mainform that contained two subforms in it. MainForm called "Employee", the two subform called "vac", and "Prevac". There is a field in my mainform called "Hours", that I'd like to use to Add with a field in Vac subform called "VacA" and a field in Prevac called "FHours". I'd like to display the total (sum of all three field on the same mainform. Is there anyone have any idea? Thanks in advance...
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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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