DCount in Microsoft Access: Count Records in a Table or Query. Show Order Count on Customer Form
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- Опубликовано: 26 июл 2024
- In this video, I will show you how to count up values from a table or query. We will count up the total number of orders that a customer has and display them on the customer form.
Roberto from Silver City, New Mexico (a Gold Member) asks: I'd like to be able to quickly see the total number of orders that a customer has when I open up their record in the customer form. Right now, I have to open up the order form and look at the number on the bottom. This would save me a lot of time.
Silver Members and up get access to an Extended Cut of this video. Members will see how to use DCount to limit the number of records in a related table (such as in a subform). This would be handy to, for example, set a maximum number of students per class, or a minimum number of items per order. We'll also see how to refresh a parent form when a child form is closed, and put that order count in the button caption. We'll also discuss why you should not use D-functions in queries (use aggregate queries instead).
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Please feel free to post your questions or comments below. Thanks.
BRILLIANT!!! Thank you. Helps my team tremendously!!!
I've been all over your videos lately. I'm making my own database. Love it. Hoping to scrounge up some money to join.
This video, particularly, helped a ton. I'm using it on my "DashboardF" to count some stuff. I even modified your calculation successfully. Pretty proud of that. But, I did run in to an issue when trying to count "Open Tasks" which is determined on whether or not the "DateCompleted" field is filled or not. So, I was trying to do a "WHERE" function where "DateCompleted=Null". No luck. I tried false and 0 as well. Not sure what I'm doing wrong. I'll probably find it in another video. Just wanted to share, though.
Thanks a TON for doing what you do!
I follow you from dakhla in kingdom of Morocco 😁😁😁😁😁😁
Greetings from Florida. :)
Thank you for the video sir.
Earlier I had faced one problem like I can't open access front end file after changing the directory of (or renaming) /back end file location.
My self found the solution for this. It is bcz, I have left the system table USysRibbons (which I have configured to hide some options and panes) in the back end file. Make the USysRibbons table as local table in the front end file then problem solved.
Cool
hi! Thx for your lessons. Can you help, what i do wrong? Then I use DCount in VBA code, take error "Expected variable or procedure, not project".
Seems like VBA doesn't see DCount, but see Count.
VBA likes DCount just fine. :)
@@599CD what to do if an error appears "Expected variable or procedure, not project" when i use dcount
How do I get the count in query to work on fields that I have lookup, give me an error message of "Data type mismatch in criteria expression". On my table I have a field that has a drop down to select certain data, so I want in the query to pull the one value of the drop down and count it. Hope this makes sense
Nope. Not making sense at all. Sorry. You may have to make 2 queries - feed the results from one into a second one.
Can one use the DCount function in a report that gets it's data from a query? I probably should clarify - I have a report that is opened with a query.. The query has an "Enter Last Name" parameter for one of the fields. Can DCount still be utilized within this report?
Possible but I'd have to see it to tell you for sure
@@599CD My query has five fields....."ID", "RenterFirstName", "RenterLastName", "CostBasicTotal" and "FunctionStartDate". RenterLastName has the "Enter Last Name" search parameter. What I would like to do is on the output report, have an unbound textbox that uses DCount to count the total records using the ID field for each specific report, so I don't have to manually count up the rentals shown in the report. As near as I can discover, DCount apparently will not work in this scenario, although for the lie of me I can't figure out why, because the DCount function comes AFTER the query is triggered. My current configuration keeps giving me the "#Error" fault.
Cheers and thanks for the help and your reply. :)
Hello. I'm trying to use this on String field and it isn't working. My goal is to get a row number count for each separate repeating groups. Because Access uses a bizarre old SQL version it doesn't have a basic feature like row_number(). I've tried to do something like: SELECT A.*,
(SELECT COUNT(*) FROM tblNames WHERE A.ID>=ID) AS RowNum
FROM tblNames AS A
ORDER BY A.ID;
But it isn't working. Do you have any ideas? Thanks.
I don't understand what you're trying to do.
@@599CD Sorry for the bad explanation but I was able to do it. I was trying to emulate the SQL Partition function in Access. My new question is do you know of a way to Transpose data in Access the same way we can do it in Excel? The crosstab query doesn't work the same way.
Great
Thanks