Question

Let’s say I have this query:

SELECT report_id, time_sent
FROM  report_submissions
WHERE report_id IN (1,2,3,4,5,6)
ORDER BY report_id ASC, time_sent DESC 

with this result:

report_id   time_sent
1           2
1           1
2           4
2           3
3           4

And I want to change that query so I will get a DISTINCT report_id with its max(time_sent), for example:

report_id   time_sent
1           2
2           4
3           4

How do I do that in the most efficient way? Thanks.

Answer 1

SELECT report_id, max(time_sent)
FROM  report_submissions
WHERE report_id IN (1,2,3,4,5,6)
GROUP BY report_id
ORDER BY report_id ASC