On Sun, 18 May 2003, James Taylor wrote:
> Hi everyone, I'm trying to figure out how to get CASE working in a sum
> aggregate function. Pretty simple query:
>
> select sum(numbers) from lists where uid=1;
>
> It's possible that there may be 0 rows where uid == 1. Instead of
> returning 1 blank row, I want it to return '0'. So, I tried this:
>
> select case(sum(numbers)) when null then 0 else sum(numbers) end from
> list_results;
I believe the case would be:
case when sum(numbers) is null then 0 else sum(numbers) end
It's more like the ternary operator than a switch statement.
