how to get data from DB and put into db

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how to get data from DB and put into db

jakub007
Hello,
1. how to get data from db into form?
2. how to update data in db while saving form?
Could U give instruction step by step?

The my problem is that I have to sum data for all forms (for example I have form for every country and every country fill form, especially some digit). Then in the other form I have to show sum of the digits for all countries. How to dothis? Could U give me instruction step by step?