I have a database with accounts, and need to make additions to certain columns:
Customer | Account | DateStatement | Risk | Balance
123 | 456 | 201606 | Low | 1000
123 | 645 | 201606 | Low | 500
321 | 852 | 201606 | High | 1500
One customer may one or many accounts, and I need the total of the costomers balance for all accounts. Obviously date and risk is the same for each customer, and cannot be added.
The table has thousands of customers, and there are about 50 columns, whereas about 20 needs to be added, while the other 30 should be shown only once. I need the result to show one line per customer, such as
Customer | DateStatement | Risk | Balance
123 | 201606 | Low | 1500
321 | 201606 | High | 1500
How can I do this the simplest way, considering I have to add about 20 columns? Subqueries seems very complex, if I need that many?
Thanks guys. It was really so simple as you suggested. I had missunderstood how GROUP BY worked. It works like a charm based on your answers :-)