I have a database that I have made with 4 different tables. In one table I have a blank cell of which I want to get the sum of 3 columns in the other tables.
I have no idea how the sql in access works so I'm basically stuck at the moment.
The column that is blank and needs the sum is:
The 3 that I need to add up are as follows:
If you could help me do this then it would be much appreciated.