Queries :: Form With Datasheet View - Trim Data In A Query

I am trying to create a form with a datasheet view that will show me all exceptions worked on all member accounts. I have over 10k members that each could have multiple issues (exceptions) worked on their account. I am using MS Access 2007.

Example: I have a member John Smith, with member id of 1234-00 that has multiple "exceptions" worked on his membership, say 5 database records for his account. My initial query I only want to see him listed once. I then would double click his Member ID to open all activity of his account.

I found the code below and modified it to fit my database and it brings me back the results I need for the above. However, if a material change is made on John Smith's account, his number is incremented. His number would be incremented to 1234-01. The next material change 1234-02, etc. I am looking to modify the code below, or another way to do it, that ignores the "-" and any numbers after it. The numbers before the "-" will never change. I searched and saw the TRIM function but couldn't get it to work.

Below is the code I'm using that has the correct names from my database. I have a primary key set up that increments and is tied to the exception, not the member id.

SELECT firstname, lastname, exceptionswrkd.memberid
FROM
exceptionswrkd AS base
INNER JOIN (
SELECT memberid, Min(id) AS which_id
FROM exceptionswrkd
GROUP BY memberid
) AS sub
ON base.id = sub.which_id;