Query Averaging Help Needed

Jun 7, 2007

Ok, here's the scoop. I have the following record setup for tracking shipments:

[Shipment_ID_#], [Date_Loaded],[primary_silo], [secondary_silo], [2_silos]

I need to retrieve average values from another table for certain chemistry values based on the [Date_Loaded] and whether or not one or two silos were used when loading the shipment (as indicated by the [2_silos] checkbox).

Scenario #1 - one silo

I need average values of the last four samples based on the [date_Loaded] and the appropriate silo.

Scenario #2 - two silos

I need average values of the last two samples from each silo based on the [date_loaded], [primary_silo], and [secondary_silo].

Would anyone have any thoughts on this? I've tried crosstab and select queries, but I can't get anything to work.

My ultimate goal is to have a form where users select the shipment and the appropriate chemistry averages automatically populate the data fields.

Any help is greatly appreciated.

Thanks,

Greg

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Averaging Date/time Fields With A Query

Apr 15, 2008

I have a table in which each record includes a field showing the time that an event started and then another field which stores "how long did it take", these two fields are both defined as a short Time. I then have a query that runs through the "how long did it take" fields to produce an average time for the whole sequence of events. Two problems:

1. The average comes out as a decimal like 39553.367942 instead of several hours and minutes.

2. When I try to access this value using DLookup on a form I get "#error"

Any suggestions?

thanks

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Aug 19, 2006

I have the following situation:

1. A Homeroom table which includes student id, academic year, and homeroom.
2. A Student Grades table which includes student id (linked to Homeroom table), term, academic year, progress grade (15 pts), and progress grade (A-F).

The contents of these tables are imported from excel, and that works fine except for one thing: in order to keep the field [progress grade (15 pts)] numeric, I had to put a 0.0 as a grade for any student who got an "I" (Incomplete) or "N/A" as his or her progress grade.

The problem arises when I want to produce an average progress grade for the student for that given term/year. How do I not include the 0.0's of students who got I's or N/A's?

Any help would be much appreciated.

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Nov 5, 2007

Not sure if this belongs in Queries/Form/Reports because it has to do with calculating formulas within all of the above but here goes anyway:

1- I've collected data that is entered by week number via a form.
2- The data utilizes fields that are to be used in calculating formulas, which I am familiar with.
3- I WANT to average the most recent 2-x weeks, (primarily, I will use the most recent 3 but would like the ability to calculate any given number), of the CALCULATED FORMULAS mentioned above to be used in reports/queries.
4- In other words for example, field a/ field b = X for one given week. Now I want to know the average of field a/ field b for the most recent x weeks.

Is there a way to perform this action? If so, can anyone help me on completing it?

Thanks,
Doug

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Aug 2, 2007

a request came accross my desk to find holidays sales in relation to the same days of the week for other weeks. For example, Thanksgivings sales compared to each of the 2 thursdays prior and the 2 thursdays after. Anyone know of a way of pulling this data so I have it all in one query - Thanksgiving, Thanksgiving+1, +2 and -1 and -2 (the numbers representing weeks from holiday

Thanks.

Brian.

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Nov 15, 2006

We have a billing scheme in which we partial-bill ceratain customers based on certain events: 30% when they sign the contract, 30% a number of days later, 30% when we ship the goods and the last 10% upon installation. This is a common process, known in many indistries as 'progress billing.'

What I am trying to do is compare the collection performance on the invoices based upon which trigger sent them. For example, I'd like to find the average and standard deviation (plus some percentiles) of the time it takes to collect invoices that are sent... when we ship, let's say.

I have a table that shows order number, invoice number, invoice date, amount and payment date. So, I can have the order number show up to 4 times with a chronology of invoice dates.

My question is this: How do I group for analysis all the FIRST invoices, the SECOND ones, etc...?

Thanks for any help! I can do this in excel... but I was given this extract of 100000+ lines, and hope to do it all in Access. Thanks again.

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Sep 16, 2014

I'm using Access 2010 and I'm a novice with databases.I have a table that contains water flow readings taken 4 times a day from multiple wells. I am trying to create a select query that will generate the daily average of the 4 flow readings.

HoleID.....Date....Flow1....Flow2....Flow3....Flow 4....Average
1111.....9-8-14.......0.........null.........7..........4......
1111.....9-9-14.......0.........null.........9..........3......
2222.....9-8-14.......0.........null.........10........7......

Also, my table also has several 0 values and NULLS meaning the well was turned off - I want to exclude the zeros and nulls when I average. How to average these numbers? Do I need to restructure my table?

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Feb 5, 2015

Access 2010 database.

I am trying to get an average from several numbered fields, which some may occasionally be blank.

=Nz([JanUS],0)+Nz([FebUs],0)+Nz([MarUS],0)

I get an error message that says "The expression =Nz([JanUS],0)+Nz([FebUs],0)+Nz([MarUS],0) cannot be used in a calculated column. This is a hypothetical expression being used.

The real expression is ...

([GC A1 - 2]+[GC B1 - 2]+[GC C1 - 2]+[GC D1 - 2]+[GC E1 - 2]+[GC A2 - 2]+[GC B2 - 2]+[GC C2 - 2]+[GC D2 - 2]+[GC E2 - 2])/10

This expression works great until a field is left blank, and then the average box is left blank.

The fields I am trying to add are Long Integer. Would that affect it?

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Nov 19, 2006

Hi,

I was wondering if i could get some help here. I got problem while trying to perform sql query. I got an error message saying

"No value given for one or more required parameters".

I think i know what caused this but i just don't know how to get around this.

The query I'm trying to perform requires 3 tables and 2 queries.
Tables: Projects, Plan_Names, Reason
Queries: PSQuery, ProjectQuery

I think this is due to the fact that those two queries are empty for a start. Hence, it needs more value.

My question is how do i in the code, tell it to execute the two queries before attempting the query i want to perform.

Thank you in advance

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Aug 28, 2005

I have a query where I need to find out the average score of employees over a date range. I have a field called date where I enter a date range (Between [START DATE (MM/DD/YY):] And [END DATE (MM/DD/YY):]) and another field where I enter the name of the supervisor. Now the table I have created contains the scores on a daily basis. So what I want is that when I enter the date and the name of the supervisor it should give me the average of the scores over that date range of all the employees under that supervisor along with the name of the employee.

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Sep 6, 2006

I have two tables, a Property table and a System table. They are linked so that there are many Systems linked to one Property.

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I'm just wondering how i would do this using a query? All the system risk scores have been entered already.

Any information would be great!!

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Jun 11, 2007

Hello everybody,

I am unsure whether this is best done in SQL or VBA, however, I do believe it is possible in SQL so I will put it here.

I have a field 'value of purchase' in which an items cost is inserted. What I am wanting to do initially is automatically deduct 20% off the value of purchase every year until it reaches zero. Now I don't want to deduct 20% off the new value every year, for example:

The price is $1000, 20% deduction is $800. But then year 2 it will be $600 then the next year $400 and so on. So I suppose the first year 20% is taken off the original price, then for year 2 40% and so on (always off the original price not the newly found values).

I want to display this in a new field 'current price'.

I am just not sure how to create the query so it will automatically deduct these amounts per year. If anybody has any advice/help it is muchly appreciated.

Thanks :)

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Sep 7, 2005

I have a database that was designed for our needs (not by me) and I have limited database experience. I am looking for someone who can guide me through simple query modifications to existing queries for a flat fee. Please respond if interested and the amount charged for services.
Chris O'Reilly

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Sep 12, 2005

I'm missing a bit of experience dealing with this query. It's very simple. I'm selecting log activities from COMLOG. However I only want the most recent DateStamp entry of each Cust_FK entry listed.

Because there are more logactivities, there are more/identical Cust_FK values. Would I first have to group these?? I just don't know how I would go about it.

SELECT COMLOG.LogID, COMLOG.DateStamp, COMLOG.Cust_FK, COMLOG.LogActivity
FROM COMLOG;

thanks

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Feb 27, 2006

Hi all,

I've searched the forums but can't seem to find anything similar. I work for social services and we have a database that stores information on children who may need services from adults when they reach 18.

What I need to do is create a query (so that a report can be run) that will show those children who will turn 18 during the year Apr 1st - Mar 31st but I'm not sure where to start. Can anyone offer any pointers please?

The fields within the database are:
Client ID, Name, Surname, Date of Birth, Address

Many thanks

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Mar 9, 2006

I have DB with a Switchboard that has a button for Bin Number (Part Number). It is based on a parameter query that asks you to input your Bin Number. Once you enter the Bin Number it pulls all information for that Bin Number from a table that contains the Bin Number, description, Manufacturer P/N and Manufacturer and shows this in the query.

What I need to do is have this information each time a different Bin Number is entered to be stored in specific table (datasheet style) for printing out just a list of specific Bin Numbers and their information. As the parameter query stands now, each time I input a different Bin Number it clears the previous information. Can I tie in a make table query in some manner that will store the selected Bin Number info?

Can someone make suggestions on the easiest and quickest way to set this up? Keep in mind I am still learning Access so please be detailed in your comments. Thanks in advance for any assistance.

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Apr 26, 2006

Hello everyone,

I�m looking for some help with a �nested query�

I have four fields that typically have a quantity amount in them.

I also have a field with a date.

I would like to say something like this

If fielda = 0 and fieldb = 0 and field = 0 and fieldd = 0 and in the date field, the date is >30day from today�s date add a 1 to this field, otherwise leave it blank

Thanks a lot

Corey

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Aug 16, 2006

Ok, here's what I've got.

I have an access database that links to some SQL Server tables. These tables hold time tickets which keep track of the time that an employee is logged into a job and records the associated product code and work code. All jobs have a work code, and some have a product code. The product coce is the most accurate way to track time, so if a product code is present I need to use that. If it's not present I use the work code.

I currently have a query called 'main' that gets all records in a specified date range and creates a 'code' column. This is a hybrid of the product code and work code using the method described above.

IIf([ProdCode],[ProdCode],[WorkCode])

Everything looks fine there, but when I go to a new query to get total hours by code ('TotalHoursPerCode') by grouping code and getting the sum of ManHour, it doesn't work.

Instead, it lumps all lines that have a product code together but then combines all lines that have no product code into a single line at the top. Instead of using the 'code' column to group.

Here's the SQL from the 'TotalHoursPerCode' query.

SELECT Main.Code, Sum(Main.ManHrs) AS SumOfManHrs
FROM Main
GROUP BY Main.Code;

Any ideas??

Thanks!

http://i45.photobucket.com/albums/f73/VolcomGrrrl79/access.jpg

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Aug 22, 2006

Hi,

I have data that I imported into access (Table1). Basically, the file shows two values with Header, Component. I need to group the Component together with a delimiter & (or any symbol) when the header is the same.

For example of what I have:
Table1
Field 1 � Header
Field 2 - Component

FG1 | SA1
FG1 | SA2
FG1 | CO1
FG2 | SA3
FG2 | CO2

What I am trying to get is
Table2
Field 1 � Header
Field 2 - Join Component

FG1 | SA1&SA2&CO1
FG2 | SA3&CO2

Thanks
Andrew

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Oct 26, 2006

Hi everybody,

Let's say that I've got the following tables:
- tblCustomers(IDCust,NameCust)
- tblEmployees(IDEmpl,NameEmpl)
- tblProjects(IDProj,IDCust,IDEmpl,Duration)

My query:
SELECT tblCustomers.NameCust, tblProjects.IDProj, tblProjects.Duration, tblEmployees.NameEmpl, Sum(tblProjects.Duration) AS SumOfDuration
FROM (tblProjects INNER JOIN tblEmployees ON tblProjects.IDEmpl = tblEmployees.IDEmpl) INNER JOIN tblCustomers ON tblProjects.IDCust = tblCustomers.IDCust
GROUP BY tblCustomers.NameCust, tblProjects.IDProj, tblProjects.Duration, tblEmployees.NameEmpl
ORDER BY tblCustomers.NameCust;

What I'd like get when running my query is:

NameCust ------ IDProj - Duration ----- NameEmpl ------- ?????????
CUST1 ---------- 1 ------ 3 ------------ EMPL3 ---------- 7
CUST1 ---------- 2 ----- 10 ------------ EMPL4 --------- 10
CUST1 ---------- 9 ------ 2 ------------ EMPL3 ---------- 7
CUST1 --------- 11 ------ 2 ------------ EMPL3 ---------- 7
CUST1 --------- 13 ------ 8 ------------ EMPL1 ---------- 9
CUST1 --------- 18 ------ 1 ------------ EMPL1 ---------- 9
CUST2 ---------- 3 ----- 20 ------------ EMPL1 --------- 20
CUST2 ---------- 4 ----- 12 ------------ EMPL3 --------- 17
CUST2 ---------- 5 ------ 3 ------------ EMPL2 ---------- 4
CUST2 --------- 10 ------ 5 ------------ EMPL3 --------- 17
CUST2 --------- 17 ------ 1 ------------ EMPL2 ---------- 4
CUST3 ---------- 6 ----- 25 ------------ EMPL4 --------- 27
CUST3 --------- 14 ------ 2 ------------ EMPL1 --------- 14
CUST3 --------- 15 ------ 2 ------------ EMPL4 --------- 27
CUST3 --------- 16 ----- 12 ------------ EMPL1 --------- 14
CUST3 --------- 19 ------ 2 ------------ EMPL2 ---------- 2

where ???????? (manually done) = the sum of the Employee duration for ONE Customer !!!

But what I get instead:

NameCust ------ IDProj - Duration ----- NameEmpl ------- SumOfDuration
CUST1 ---------- 1 ------ 3 ------------ EMPL3 ---------- 3
CUST1 ---------- 2 ----- 10 ------------ EMPL4 --------- 10
CUST1 ---------- 9 ------ 2 ------------ EMPL3 ---------- 2
CUST1 --------- 11 ------ 2 ------------ EMPL3 ---------- 2
CUST1 --------- 13 ------ 8 ------------ EMPL1 ---------- 8
CUST1 --------- 18 ------ 1 ------------ EMPL1 ---------- 1
CUST2 ---------- 3 ----- 20 ------------ EMPL1 --------- 20
CUST2 ---------- 4 ----- 12 ------------ EMPL3 --------- 12
CUST2 ---------- 5 ------ 3 ------------ EMPL2 ---------- 3
CUST2 --------- 10 ------ 5 ------------ EMPL3 ---------- 5
CUST2 --------- 17 ------ 1 ------------ EMPL2 ---------- 1
CUST3 ---------- 6 ----- 25 ------------ EMPL4 --------- 25
CUST3 --------- 14 ------ 2 ------------ EMPL1 ---------- 2
CUST3 --------- 15 ------ 2 ------------ EMPL4 ---------- 2
CUST3 --------- 16 ----- 12 ------------ EMPL1 --------- 12
CUST3 --------- 19 ------ 2 ------------ EMPL2 ---------- 2

Any suggestion to build this Query ??
Thanks in advance

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Mar 27, 2007

I am asked to display this, "List the Client Numbers, Name, and Balance fields in the design grid. Sort the records in desending order by the Balance Field."
AND THIS: "Display the top 25%"

I need to know how to show the top "25%" when I press run, in the datasheet without manually having to arrange them.

I would love detailed instructions ASAP!

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Mar 29, 2007

Great forum guys! Just had to join it :)

I've been doing Access for just under 2 weeks now, so far I'm doing ok, but I've just run into 2 problems. I hope someone can help me on them.

The first problem is on a query. I have a Column called "Type" in my query and the choices under Type could be RECEIPT, REJECT, BOTH

(BTW: BOTH should show all records RECEIPT and REJECT)

By using case statements as shown below, i can easily return records for RECEIPT and REJECT, however, i cannot get BOTH to work

The criteria i have set for TYPE in my query is,

[forms]![frm_Vendor]![opta] OR [forms]![frm_Vendor]![opta] Is Null

Case 1
opta.Value = "RECEIPT"
stDocName = "rep_search"
DoCmd.OpenReport stDocName, acPreview

Case 2
opta.Value = "REJECT"
stDocName = "rep_search"
DoCmd.OpenReport stDocName, acPreview
Case 3
opta.Value = " "
stDocName = "rep_search"
DoCmd.OpenReport stDocName, acPreview

Case 3 does not work. with " " . So what do i do here to show Both records?

My second problem is with the reports opened with the above Case code. The search routine (apart from Both) work fine. It finds the records i ask of it and it opens a report to show them, however, there are instances where no records are found, and the report still opens!!. In my search form, what code can i use to test my query for "null" data before
it even gets a chance to open the report?

Thanks in advance for any help.

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Apr 11, 2007

i am trying to update a field within a table. But i dont want to update the whole of the data within the field just one part of it.

The field is the Tutor Group for students in the format 7B, 7D, 7F, 7H, 7M, 7S, 8B, 8D, 8F,... etc where the number represents the year group! i want to use an expression that would add(+) 1 to the year group but leave the letter the same as this doesn change. By doing this the above list would change to 8B, 8D, 8F, 8H, 8M, 8S, 9B, 9D, 9F, ...etc

I attempted to use the following expression: ((*)+1)(*) but it didn't work.

I should have had the year groups separate but i am given an Excel flat file which has details of the students and doesnt separate the the two.

any help would be much appreciated! hope someone can help!

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Aug 13, 2007

Hello all,
I need help with making a query this will check the OrdQty for all items in a specific order against the Sup1inv field, then if supplier 1 can not fill the order have it check against Sup2inv field.
Here is an example of the data im working with

Order# Item# OrdQty Sup1Inv Sup2inv
555 widget1 2 1 3
555 widget2 1 1 4
556 widget3 1 3 0
557 widget1 7 1 3

The part i am having trouble with is making sure the query "understands" that both items on order 555 are the same order so the end result would tell me that order 555 needs to be placed at supplier 2, not 1.

Thanks in advance for the help,
Eddie

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Feb 25, 2008

Original Table
ozip dzip shipdate wgt Transport cost

A B 12/1/07 20 450
C D 4/1/08 15 890
E F 9/1/08 78 750
A B 12/1/07 42 789
X Y 1/1/08 17 900
C D 4/1/08 34 90

Needed Output

ozip dzip shipdate wgt Transport cost

A B 12/1/07 20 450
A B 12/1/07 42 789
E F 9/1/08 78 750

I need to create a query which extracts rows with wgt >60 and also WHEN the fields ozip, dzip and shipdate are same, the query should add the wgts and then sum of wgts should be >60- for example the first and fifth rows should be extracted since sum is 62.

I have attached the output that is required for the above example. please help

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Aug 20, 2004

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The problem I am having is that I have not been able to get the count of distinct Districts w/in the County. I am able to get the correct count for the number of Schools w/in the County and Districts. I would like the District count to show in the RED boxes on the form.

Attached is a sample of what I am working with.

Thanks,
Lodai

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