Thank you for enquiring so quickly.
I am not good at programming in VBA and I find it quite strenuous to program macros.
I am having a try at setting up a database for a friend who makes handicraft knives.
The idea is that I have multiple tables that have identical structures and that are better to remain separated.
I will use these tables that contain information about the various items used in the fabrication process. I would like to do that from the same tables as it would then be easier for me to keep track of the inventory on each of this items. But from a practical point of views it would be more efficient to update the data in these separate tables.
Once I have selected the various items using an adapted form, I make up a cost price that has to be inserted into another "final products" table.
Such updating would have to be automatic as the raw materials might change in prices and thus generate a different cost price. Here I also have the issue of keeping track of the history of the final product cost price and the history of the raw materials cost price....
Now that I am explaining it, it seems like you will probably think my problem is too complicated....
Thank you anyway for proposing your help