Access data vba - ms-access

I have a database where users updates info and get their count shown after every save. But when I done a split database the users are able to see total users count instead of individual count can some one help

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How to print concurrent visitors on a website using sql query?

In this database, there are data entries which shows login time and logout time of visitors. I want to print the number of concurrent visitors at each entry using sql query preferably by using self join.An example The table named "visitor" has 3 columns i.e user_id, login_time amd logout_time. I want to create a 4th column which will show the number of concurrent users during the login_time of that particular entry. In the given example, I have manually displayed the number of concurrent users but I want to write a query which will automatically display the number of concurrent users

Creating a running aggregate of users to date in MySQL query

I have table that has users with unique IDs and a date field for when the account was created. I am able to generate a query that can tell me how many people signed-up within a particular week of the year. However, what I am interested in is the number of users that signed up historically + that week. Does anyone have any ideas?
Constraint, I have read only access to the database and can not write new tables and columns.
I've successfully gotten the counts broken up by week, but I can't not figure out how the table can refer to itself to get a running total.

MS Access: How to search a value on a table by clicking on a form record

I'm pretty new to Access and coding in general and I've been working on a database that was filled with data extracted from SAP.
I have a query that works as a way to "summarize" the information of a bunch of records from some purchase orders, it does sum the total of each PO, it's date as well as other information. It does consolidate a variety of items related to the purchase order into a single record that is displayed in a continuous subform for easy analysis in this structure.
[MES_CORTE][SOLPED][PO][FirstMIGO][TOTALPOVALUE]
This way, the user can preview easily each purchase order, date, value and other relevant information. This query is also used to generate some reports.
However, I want to be able of opening the source table ([Registro_OC]) and search the related records by clicking a field on the subform for a detailed view and posibly to edit or enter new data. is it posible?
I've tried to code some macros but can't figure out how to reference the table fields related to the query fields that are on the form.
Also, it seems that Access doesn't allow to create subforms based on continous forms.
Any help and opinions are appreciated.

Microsoft Access database adding multiple row in form

I have created the database in access, to enter daily inspection data, some time for one item we have to add multiple type rework entry and for that every time we have to select product name every time, and its time consuming
what I am trying to find that add multi-row in my form which will store different types to data in separate rows in the main table and product name will take automatically for all rows data

Creating a data-entry Form with multitable Query

I have a form in my Access Database that is used for students to scan their badge and log in. If their badge hasn't been registered, the form just allows them to enter their information. I'm running into a problem where I'm using a Query that pulls their badge number from the previous form (which is inserted into a table temp) and compares it to the table with their information on it.
The problem I'm running into is that when I do this, I can't edit the information in the form, nor can I add more to entries, and when I separate the query and try to just pull from the table externally
(BadgeNumber = [temp]![T2])
it just pulls up a messagebox asking for the value.
Does anyone have any suggestions for accomplishing this?