troubleshooting Question

Query to get results from the last hour where the target column is a timestamp.

Avatar of Larry Groves
Larry GrovesFlag for United States of America asked on
Oracle DatabaseSQL
8 Comments1 Solution98 ViewsLast Modified:

I'm trying to write a select where I can get part numbers sold in the last hour. The thing is, I'm having difficulties in getting the results right. Here's the info...

select c.partnumber,o.timeplaced,count(o.orders_id) AS count
from orders o
inner join orderitems oi on (o.orders_id = oi.orders_id)
and o.timeplaced > current_timestamp - interval '1' hour
group by c.partnumber,o.timeplaced;

This all works fine. The issue is that since timeplaced is a timestamp, it goes down to the millisecond. Therefore, I'm not able to get the grouping I'm looking for. I really only want orders placed in the last hour. I really don't care about doing any ordering, although being able to order by the count would be nice.

How can I run my query but only get results in the last hour so the grouping will be better? For example, in my current query, the results look something like this...

123456      10/16/2018 7:22:23.325000 AM      1
123456      10/16/2018 7:34:40.448000 AM      1
123456      10/16/2018 7:54:51.566000 AM      1
123457      ...

When I'd like it to be:
123456      10/16/2018 07 AM                  3  
123457      ...

I did try using TO_CHAR(o.timeplaced,'yyyy-mm-dd hh24') in my select, but the results are basically the same. I'm wondering if this is because of the "and o.timeplaced > current_timestamp - interval '1' hour" while the "TO_CHAR(o.timeplaced,'yyyy-mm-dd hh24')" is just for display.:
123456      10/16/2018 07 AM                  1
123456      10/16/2018 07 AM                  1
123456      10/16/2018 07 AM                  1

Information Technology Specialist

Our community of experts have been thoroughly vetted for their expertise and industry experience.

Join our community to see this answer!
Unlock 1 Answer and 8 Comments.
Start Free Trial
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 8 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros