I'm still new to Microsoft Access so I don't have a great understanding of its workings but have spent the past couple of months working on a project to manage the company's telphone bills. I'm essentially compiling the usage from every company phone each month into a final table by running the numbers through a sequence of queries set up by a senior staff member (I'm just a part time uni student).
However, while adding in data from the month just past, I made an error somewhere along the line and its giving me the message "Data type mismatch in criteria expression" when trying to run one of the queries. I've been struggling to work my way around this so any help would be greatly appreciated