Newbie Question - Sum of Various Fields

I am a little confused on how to do the following.....

I have the foloowing fields:
reservations
price
total_reservations
available_seats
total_seats
income_total
income_needed
payment_received

1 - In the 'total_reservations' field, I would like the sum of all of the
'reservations' fields.

2 - In the 'available_seats' field, I would like the sum of 'total_seats'
minus 'total_reservations' field.

3 - In the 'income_total' field, the sum of all 'price' fields.

4 - In the 'income_needed' field, the sum of a set number ($1100.00 for
example) minus the 'income_total' field.

5 - A PAID logo to display if the 'payment_received' field is not empty (or
does have a value in it).

Any help would be greatly appreciated.

Thanks,
Craig

Craig Barnes wrote:
>I am a little confused on how to do the following.....
>
> I have the foloowing fields:
> reservations
> price
> total_reservations
> available_seats
> total_seats
> income_total
> income_needed
> payment_received
>
> 1 - In the 'total_reservations' field, I would like the sum of all of
> the 'reservations' fields.
>
> 2 - In the 'available_seats' field, I would like the sum of
> 'total_seats' minus 'total_reservations' field.
>
> 3 - In the 'income_total' field, the sum of all 'price' fields.
>
> 4 - In the 'income_needed' field, the sum of a set number ($1100.00
> for example) minus the 'income_total' field.
>
> 5 - A PAID logo to display if the 'payment_received' field is not
> empty (or does have a value in it).
>
> Any help would be greatly appreciated.
>
> Thanks,
> Craig

I'm a lot confused. Are these all fields in a database table? If so you have
a serious design problem since you have a mix of detail and summary level
fields. Your table should contain only the detail level fields (plus of
course a suitable key). The total fields should be created dynamically in a
query.

Also, mysql is a RDBMS, it stores data and allows you to retrieve it in
various ways. It does not "display" anything and so cannot display a logo.
If you are using a programming language to retrieve the data, you may be
able to use that to force whatever UI (user interface) you are using, to
display a logo.