Re: case statement to cath nulls on joined tables

Try that:

SELECT address, CASE WHEN value_of_interest IS NULL THEN 'more friendly
message' ELSE value_of_interest END value_of_interest
>From poly_table left outer join data_table one poly_table.common_id =
data_table.common_id

--
Matheus de Oliveira

On Fri, Feb 3, 2012 at 10:45 AM, John Morgan <jdmorgan(at)unca(dot)edu> wrote:

> Hello,
>
> I am doing a left outer join between a polygon table and a data table.
> Everything
> returns fine from this join as expected. However, there are cases where
> there isn?t data for a given polygon and this return as the expected null
> in the result set. I would like to utilize something like a case statement
> to catch the nulls and return a ?more friendly? message. I have tried
> unsuccessfully to use the following logic:
>
> *Select case value_of_interest null then ?more friendly message? else
> value_of_interest end*
>
> *From poly_table left outer join data_table one poly_table.common_id =
> data_table.common_id*
>
> If someone could let me know where I am going wrong it would be greatly
> appreciated.
>
> Cheers,
>
> Derek
>