Try this:
SELECT
(SELECT <your_column>
FROM <your_table>
ORDER BY <your_column> offset 0 LIMIT 1) ,
(SELECT <your_column>
FROM <your_table>
ORDER BY <your_column> OFFSET (SELECT COUNT(*) ) LIMIT 1)
FROM <your_table> LIMIT 1;
On Wed, Sep 2, 2015 at 7:27 PM, Rob Sargent <robjsarg...@gmail.com> wrote:
> On 09/02/2015 05:14 PM, Tom Smith wrote:
>
> Hi:
>
> I need to get the first and last tow in one sql like below
>
> select first(col1), last(col1) from table order by col1
>
> I saw some posting in wiki with a custom function (or C extention)
> to do this. Is it widely used and reliable?
> https://wiki.postgresql.org/wiki/First/last_(aggregate)
>
> I am wondering why these two functions are not part of postgresql built-in
> functions as it has many use cases
>
> Thanks
>
> If you're ordering by col1, does
>
> select min(col1), max(col1) from table order by col1
>
> not do the trick;
>
--
*Melvin Davidson*
I reserve the right to fantasize. Whether or not you
wish to share my fantasy is entirely up to you.
