select statement

[sagsh]

Hi

I have an accounts package which uses a sql database and one table within this database holds the orders table.
I am trying to run a simple report which works out the total value of the orders - the table holds in seperate columns the following data - value, quantity and spare - now normally I would do a sum(quantity*val) to get my total per row however if the customer uses a foreign currency the exchange rate is held in the spare field.
therefore I do sum(quantity*sum/spare) this works fine where there is a rate but when it is blank I get the error cannot divide by zero

Any ideas what I am doing wrong or a workaround?

Thanks for any help!
Sagsh

[skhanal]

You can use ISNULL function to divide by 1 if the column value is NULL.

sum(quantity*sum/ISNULL(spare,1))