Query Return 0 For Null Values
Feb 22, 2012
I have two tables: tblStudents and tblEnrollments. The query I have designed shows the StudentID and counts the number of Enrollments that each student has. I want the students who don't have any enrollments to still show up and have a 0 by their ID. Right now, only the students with enrollments show up in the query results.
Here is my SQL Statement:
SELECT tblStudents.StudentID, Count(tblEnrollments.EnrollmentID) AS CountOfEnrollmentID
FROM tblStudents INNER JOIN tblEnrollments ON tblStudents.StudentID = tblEnrollments.StudentID
GROUP BY tblStudents.StudentID;
What do I need to do to it to have null values display as zero?
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May 25, 2006
I have a query that uses a linked table from an external database and joins it with a table from my database to return records that contain the same values.
Is there a way to return only the records that are present in the external database and not in my db?
Thanks
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Dec 10, 2007
Hi All,
I need an Access query to return the rate at which a customer should be charged. A customer's rate can be set for a period of 1 to 6 months and the customer's rate table could look like this:
ACCOUNT_ID........START_DATE........END_DATE...... ..COST_PER_UNIT
31308.................01-Apr-07................30-Jun-07.................6.195
31308.................01-Jul-07.................31-Aug-07.................6.304
31308.................01-Sep-07................31-Mar-08.................5.422
31308.................01-Apr-08.................31-Aug-08.................6.304
I need a query (preferrably SQL) that will return the rate a customer should be charged each month, e.g.
31308 / Aug 07 / $6.304
31308 / Sep 07 / $5.422
31308 / Oct 07 / $5.422
etc, etc
I'm using Access 2003 and the rates table contains details of about 2500 customers.
Any ideas would be welcomed.
PS. Can someone tell me how to paste a table straight from Excel into the forum post body???
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Aug 2, 2014
I have a table that has a list of tasks and checkboxes attached to them to be checked once the task is completed. I need to run a query on the table that will only bring me back the tasks with a completion that is false.
Everything that I read online indicates that this is a difficult task for access. Maybe I can accomplish this in SQL view instead of design? If I put false is all of the yes/no fields, the query brings back nothing.
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Sep 22, 2015
I have a set of devices that are assigned to a truck, on occastion they are moved from truck to truck, I need to be able to track where they are AND where they have been. Here is what I have:
ID (autonumber)
GPS ID (number, this is the specific ID to each device)
Truck Number (this is the specific ID for each truck
Installation Date (Date installed / moved)
I have created a query to show the data I need, I have put them in order based on date.
- I must keep each event stored on the table
Goal:
To show a list of the current location of each device, nothing more.
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Jan 11, 2014
Trying to run a query where each 4 fields calling a custom function will not just re-run the same custom function over and over again for each field in a single record.
A Function has a huge amount of multiple queries and logic to perform.The Function returns a Integer, Integer, Integer, and optional Integer. Each integer requires a DLookup to lookup a String description value for each individual integer (in each of 4 fields).
The problem is, the DLookup in each column that runs against each of the integers re-run the same function.The result is that a single record, each of the 4 columns returning a single of the 4 values, the complex function is re-run 4 times.
The function is huge, part of a Business Rules Engine. Depending on the Rule-Meta data - it might launch up to a dozen queries and perform logic steps for each record. This is not the ordinary SQL Query.
Imagine if one record (for 1 field) takes 0.1 second to run. By referencing the function in 4 columns, this same function is re-run 4 times (0.4 Seconds) Against 50,000 records - this duplication of re-running the function for each column can really add up.
Possible Solutions: Researched Class Modules - There is a comment that the property Get, Let actually reduce performance. There are huge advantage of code documentation, documentation and centralization.It doesn't claim class modules reduce execution as each propery is returned. It also describes that Class Modules can't be called directly in a Query - unless each property is wrapped in a function.
Function Returns one String with delimiters: e.g 34;54;55;1 This single column goes into a Make Table (runs function one time per record) Then the D-Lookup is run against static local data. This pevented the function from being run over and over across the network linked data.
Final Solution: Eventually, the many hundred lines of VBA code for the Rules Engine will be converted into SQL Server T-SQL Functions on the server.For a Rule Engine development, Access has been great for a rapid protoype development and testing. The TSQL will be a final big step requiring re-coding. It is not currenty my option for the delivery time frame.
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Dec 4, 2005
I need to create a query with the MTD field
I have created the MTD and it works!!! but now I need it to show all of the PartNum fields even if null. do I need to convert all nulls to zeros? if so how do I go about this?
Here are the fields in the query
First Field:
Field: PartNum
Table: Part
Total: Group By
Second Field:
Field: UnitPrice
Table: OrderDetail
Total: Group By
Third Field:
Field: NumOrdered
Table: OrderDetail
Total: Sum
Fourth Field:
Field: MTD: Sum([NumOrdered]*[UnitPrice])
Table: (blank)
Total: Expression
Fifth Field:
Field: CurrentYear: Year([OrderDate])
Table: (blank)
Total: Group By
Criteria: Year(Date())
Sixth Field:
Field: CurrentMonth: Month([OrderDate])
Table: (blank)
Total: Group By
Criteria: Month(Date())
When I run the query I only get 2 parts and their total. but I want all parts to show up even if they have not been ordered in the month. the parts that have not been ordered should say $0.00 in the MTD field.
Any Suggestions???
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Oct 24, 2007
Hi
I have a query that runs off three tables: These are tbl_contacts, tbl_status, tbl_publications. All contacts have a status but not all will have a publication. The problem is that when i run the query on a status type where none of the contacts for that status have a publication it will return no results, where what I actually need is for it to just return the details of those contacts for that status. The whole query runs off a form with combo boxes.
grateful for any advice
Shapman
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Nov 9, 2005
Hi,
I have a problem with one of my query, the query has 2 tables, the secondary field from Table2 is linked to the primary field of table1.
The primary field Doesn't allow null Value
The Secondary Field does allow null value which means that the Data in table 1 only concern Some of Table2's Data.
If I run the query with the two tables I can only see the records with the secondary field with no Null Value.
Is it possible to get the query Showing All the records of table1 2 and Table1 even if Table1 has no values?
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Sep 7, 2007
Have the following scenario with perhaps inbuilt fatal flaw
Building an Inventory Management db and in the process of constructing the tools to move some inventory from 1 location in the warehouse to another (purely an internal transfer)
Part of my table design includes an allocated quantity field to record any outstanding orders for this inventory unit (I am planning on a built in LIFO system, which I haven't got around to contemplating yet)
All went well, the stock was decreased from the existing location using an update query. but failed to materialise in the new location using an append query
After much yelling and cursing at the offending query, finally did a search and found the following:
Update queries will not work if you trying to append a primary key value (knew that one) OR you are trying to append a null value into a field
In the real world, it may well be possible that I will have 0 allocations for a given inventory unit
Does anybody know a way around this seeming impass, or am I faited to rebuild my tables again?
Thanks in advance for any enlightenment
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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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Oct 10, 2011
2007 version - my child query is not returning null values. I have 2 fields, both pulled from a parent query. One is "DaysSinceRecd", the other is "AmountPaying". The parent query returns multiple results, which is fine. For example, the parent query might have 10 different records for "0" "DaysSinceRecd", with different "AmountPaying" for each of those records.
In the child query, I am trying to condense that down, so that I only have one "AmountPaying" for each "DaysSinceRecd". It's working fabulously, except that there are records in the parent query that have a value for "AmountPaying" but a null value for "DaysSinceRecd". The null value for "DaysSinceRecd" cannot be changed to another value, it needs to stay null. My child query is not returning the null records. I tried adding to the criteria: IsNull Or IsNotNull, >=0 or <=0. That's not working.
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Apr 23, 2007
Here is my sample DBA
I'd like to solve this issue
when I open my Quotations form I'd like a set of services to be selected by default, ex: Brush and Pen. So the user only has to input the quote amount
is there anyway to have the form open with a script like:
"on open (or on load). in subform SELECT refproduct where product from tblproducts = 1 and also SELECT refproduct where product from tblproducts = 4"
Therefore when my main form opens, in the subform I have already Brush on the 1st line selected and pen on the 2nd. My user only has to type the price.
Thanks for your much appreciated help
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Mar 21, 2006
I have a form with 4 different search fields used to query a table and limit results: Policy#, SSN, Credit_Amt, Debit_Amt. Any matching rows based on the search criteria are returned in a subform.
My problem is how to handle any fields where the user doesn't specify a search value.
In my query, I have the Criteria set to:
Field: Policy_No
Criteria: =[Forms]![form name]![Policy#]
Field: SSN
Criteria: =[Forms]![form name]![SSN]
and so on....
If I place my criteria on different OR lines, the query runs, but if a user specifies more than 1 criteria, I get all the data for one criteria(such as policy# matches) and all the data for the second criteria(such as all the records for a certain credit_amt, regardless of Policy #).
If I place my criteria on the same criteria line, effectively making it AND, I get no results because I assume the database is looking for any blank search field values.
So, how do I make the query an "AND" query, but actually get results by ignoring any NULL search fields? So if a user enters a Policy# and Credit_Amt, the results will be only matching rows by Policy# AND Credit_Amt, and doesn't look at SSN and Debit_Amt.
I've tried different iterations using IIF(Not IsNull(.... to no avail.
Thanks!
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Jun 26, 2006
Hi,
This query will allow me to view payments that are made between 2 dates. I would like to know how to flip the query around so that it gives me the payments that have not been made. I think this would be described as returning the null values?
The SQL code i have at the momnet is:
SELECT download20060602.Date, download20060602.Description, download20060602.Amount, Members.FirstName, Members.[Mid Name], Members.Surname, Members.[Memb No]
FROM Members LEFT JOIN download20060602 ON Members.description = download20060602.Description
WHERE (((download20060602.Date) Between [Enter Start Date] And [Enter End Date]));
Any help or ideas would be fantastic.
Cheers
Phill
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Aug 12, 2006
Hi there.
I've attached my db in the hope someone can help my head scratching.
I have got a Sales summary table with several other related table. Most notably, a table with the items in the sale and one with the costs. Because each sale might contain many different items and many different costs, I thought seperate tables were the way to go.
All I'm trying to do is make another query that gets the total sales (That's adding each line item * quantity) - (Each cost line item*it's quantity) and then finally the margin made on the deal.
However, if there are no costs or sales involved in the sale the query ignores it. (Sounds odd, but some transactions might be cost free, and some may not involve any revenue - so I have to bear it in mind).
I tried the Nz function, but It's either not what I need or I'm doing it wrong.
How do I get this to work?
Many, many thanks!
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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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Sep 24, 2014
I have an append query created to add files to a table from an imported excel file. The table to which I am appending (SubTBL) has a field names Observation. This field is not required. There is a relationship to another table (ObservationTBL) which has 3 records. The information I am trying to append includes 7000 records, about 4000 have observations assigned and they match the information in the ObservationTBL. The remaining 3000 have blank records for observation. When I run the append query, only those with observations are appended. The rest are not added because of "key violations". I removed the relationship between the ObservationTBL and the SubTBL and the append query runs. Then when I try to re-do the relationship it fails "Violates referential integrity rules".To be clear:
1. The records without an observation are blank. (There are other fields in this append that have blank fields also and they are not causing any problems)
2. The field observation is NOT set to required.
Is it not allowing Null records?
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Apr 17, 2013
I am currently creating an Access 2007 database for calculating salesperson commissions. I have a table with 5 fields I'm working with: SalesRep, SOWRep, TerritoryRep, Period and Commission. I am trying to build a query that will calculate commission for a salesperson for each record where their name appears in one of the first three fields. Each time their name appears, they get the commission listed in the Commission field for the stated Period. I have managed to do this part successfully. My problem now is that I am creating a query that will sum all of their commissions by Period. I have run into a situation where sometimes a salesperson will not appear in one of the rep fields, resulting in NULL values in the previous queries. How can I create a final query that will sum correctly even if there are NULL values returned on the previous queries?
Here is what I have so far:
November: Avg((SELECT [SumOf1/3GM$s] FROM [BaxterActualMargin1] WHERE [Period] Like "November*")+(SELECT [SumOf1/3GM$s] FROM [BaxterActualMargin2] WHERE [Period] Like "November*")+(SELECT [SumOf1/3GM$s] FROM [BaxterActualMargin3] WHERE [Period] Like "November*"))
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Dec 19, 2012
NOTE: Im working in MS Access 2003, only results in this SQL/database (not mysyl, MSSQL etc)
I want to be able to ORDER an SQL query and put the NULL values last.
I have a basic databse:
Table name: PeopleTable
Field names: TableID, PersonField, PersonID
The aim is to order by PersonID and put the NULL values last
See pic1.jpg;
The picture (pic1.jpg) shows the database as it is without a query.
See pic2.jpg;
Picture 2 (pic2.jpg) shows the query results when I use the orderby statement (SELECT * FROM PeopleTable ORDER BY PersonID As you can see it shows the results ordered by the PersonID however the NULL values are first.
See pic3.jpg
Desired results, it is ordered by the PeronID and the NULL values are last (NOTE this is an editied screenshot).How can i achieve this is MS Access 2003?
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Apr 24, 2006
Hi all
i would like to know if there is a way to return a field to null
thanks in advance
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Apr 24, 2006
Hi all
i would like to know if there is a way to return a field to null
thanks in advance
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Dec 12, 2005
When the SSN field is null I would like this query to return : 000000000, is this possible and if so could you show me how? Thanks
SELECT
[CASEHEADS RECEIVING NON WELFARE MONEY].IVA_MEMBER_ID AS [IVA #],
[CASEHEADS RECEIVING NON WELFARE MONEY].MEM_SSN AS SSN,
Sum([CASEHEADS RECEIVING NON WELFARE MONEY].AMT_DISBURSE) AS AMT,
[CASEHEADS RECEIVING NON WELFARE MONEY].DT_DISBURSE AS [DATE] INTO [CASEHEADS RECEIVING NON WELFARE MONEY TBL2]
FROM [CASEHEADS RECEIVING NON WELFARE MONEY]
GROUP BY [CASEHEADS RECEIVING NON WELFARE MONEY].IVA_MEMBER_ID, [CASEHEADS RECEIVING NON WELFARE MONEY].MEM_SSN, [CASEHEADS RECEIVING NON WELFARE MONEY].DT_DISBURSE
ORDER BY [CASEHEADS RECEIVING NON WELFARE MONEY].IVA_MEMBER_ID;
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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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Jul 30, 2007
I have a form that using a combo box to select specific record, sometimes we need to see all records, i would like if the combo box if left empty to return all records. I typed this expression but it returns no records when combo box is empty.
IIf([Forms]![FrmReports]![LoanOfficer]="IsNull","*",[Forms]![FrmReports]![LoanOfficer])
If i use this expression i get the wrong results when a Loan Officer ID is enterd;
LIke([Forms]![FrmReports]![LoanOfficer] & *
Example of wrong results, if Loan officer Id is 1, then it returns loan officers 1,11, 111
Thanks in advance for any help
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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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