I am completely new to Access and how to do anything with it outside of tables and queries. I have been tasked with creating a form to do fairly basic things. Via tutorials I have managed to use the Expression Builder to do virtually everything I need except one thing.
I need to pull a value from row 2 in a specific column from a subform and subtract it from row 1 in the same column and subform leaving behind a + or - number for the user. Similarly, I need to do the same but subtracting the LAST ROW from row 1. If there is only one row at the time the operation is being performed, a value of No Data needs to be returned instead of a number.
I have not figured out how to do this and it was suggested to write a procedure? I have no idea how to do that either.
Any help or insight would be greatly appreciated.
I need to pull a value from row 2 in a specific column from a subform and subtract it from row 1 in the same column and subform leaving behind a + or - number for the user. Similarly, I need to do the same but subtracting the LAST ROW from row 1. If there is only one row at the time the operation is being performed, a value of No Data needs to be returned instead of a number.
I have not figured out how to do this and it was suggested to write a procedure? I have no idea how to do that either.
Any help or insight would be greatly appreciated.