Combine fields, basic operations (total, sum, etc)

Hello.
Really nice component.
I have two questions for you:
1. I would like to combine 2 fields from diferent tables and put it in new one view. Could you help me?
2. I have to do basic operations (sum, multiplication, total, etc) from diferent records from my database, some recomendation?
Thank you.
Jaime

For example.
I have two tables:
First one of minerals and second one information about chemical family and type of mineral.
I have to put in the first view "minerals" the field "Type", for that, I' would like to use foreign Key with a combination of name of chemical family and type of rock for field value and I need to maintain the field key of table for to save in the table minerals.
Could you help me?
Jaime

Could you help me?