"Richard Huxton" <[EMAIL PROTECTED]> writes:
> From: "Matthias Teege" <[EMAIL PROTECTED]>
>> is there any way to get the last x records of an query
>> result?
> Otherwise, the only thing that I can think of is to set up a view that does
> the LIMIT n on a DESC then sort ASC when selecting on that view - might
> work.
Not in 7.0.* or before --- there is just plain no way to get multiple
levels of sorting in a query. In 7.1 you can do it like this:
SELECT * FROM
(SELECT ... ORDER BY foo DESC LIMIT n) ss
ORDER BY foo;
A workaround in 7.0.* is to use a temp table:
SELECT ... INTO TEMP t1 ... ORDER BY foo DESC LIMIT n;
SELECT * FROM t1 ORDER BY foo;
DROP TABLE t1;
The extra sort step shouldn't affect the speed much as long as n is small.
regards, tom lane
