ms access form listbox changing whole field

Question

I have created a form to update a query that that is in turn based on a master table containing information on a number of files. This master table is then related to several other tables in say for example a table called group_table, defining which group the file would belong to, which contains an ID field and the group_name. This is then related in a one-to-many relationship with the master table based on the group.ID and a field in the master table master_table.group and joined in the query the form is based on.

In the form I have designated a listbox control to update the group field of the query/master table. The contents available for selection in the list box were set based on the group_name field from the group_table table which is defined in the RowSouce section of the property sheet of the form.

So my issue is that when I try and update any records in the query using the listbox in the form, all of the records that are the same will get changed as well. E.g., changing a record in one row from "Group A" to "Group B" will change all the records containing "Group A" to "Group B" in the group field. So I was wondering if there is anything I can do to set it so only the specific record that I want to change gets changed.

Answer 1

When you are making the call to update the table you should make sure that you are using WHERE along with the primary key to make sure that you update that row only. An example would be a statement similar to the one below.

CurrentDb.Execute "UPDATE [group_table] AS G INNER JOIN [master_table] AS M 
ON G.[ID] = M.[groupID] 
SET G.[group] = '"& Group A & "' 
WHERE M.[groupID] = '" & groupIDFromForm & "';"

Apply the ON from the join so that the foreign key and primary key are going to share the same value, and from there use the form to create a variable that you can use to identify the exact row. From there the program should execute the query correctly.