Hi;
also you can try this query which should work for any version
SELECT
a.userid, a.data, max(f.data), a.data - max(f.data)
FROM
(SELECT userid, data FROM foo EXCEPT SELECT userid, min(data) FROM
foo GROUP BY userid) a LEFT JOIN foo f ON (f.userid = a.userid AND
f.data < a.data) GROUP BY a.userid, a.data ORDER BY a.userid, a.data
A B wrote:
With 8.4's analytic capabilities you can do this:
select * from (
select userid, data - lag(data) over (partition by userid order by data)
diff
from foo) q
where diff is not null;
Thank you! That worked perfectly!
