Re: ordering by multiple columns

Pablo Barrón <amentoraz@gmail.com> schrieb:

> 
>  Hi!
> 
>  I'm trying to order a list in which the first parameter to order is a specific
> field, and the second should vary depending on a specific condition. More
> explicit, I would like to do something like:
> 
>  - ORDER BY a.column1, [b.column2 if c.value != 19 || c.column2 if c.value==19]
> 
>  That is to say, use a column if a value on each row isn't 19, OR use a
> different column if it isn't. How could I solve this? I've got to have a global

You can do something like this:

order by a.column1, case when c.value != 19 then b.column2 else c.column2 end;


*untested*, but the way is to use a case when <condition> then ... else
... end; - construct.


Andreas
-- 
Really, I'm not out to destroy Microsoft. That will just be a completely
unintentional side effect.                              (Linus Torvalds)
"If I was god, I would recompile penguin with --enable-fly."    (unknow)
Kaufbach, Saxony, Germany, Europe.              N 51.05082°, E 13.56889°