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postgresql events per hours


postgresql events per hours

By : Anveshi Shukla
Date : November 19 2020, 01:01 AM
I hope this helps you . I need to calculate events per working hours with different groupings (person, type of event, etc). , I double grouping should work in these cases:
code :
select occupation, day, sum(events)*1.0/sum(hours) ratio  from 
(select occupation,day,work_shift_id, sum(events) events
from person_work 
group by occupation, day, work_shift_id) a
join
person_work_shift b on a.work_shift_id=b.shift_id
group by occupation, day


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problems with sql hours ( postgresql )

problems with sql hours ( postgresql )


By : RS Rahul
Date : March 29 2020, 07:55 AM
wish of those help Your first problem is, that you are storing the data incorrectly.
This:
code :
insert into schedules(code, datetime, street)
values ('005',TO_DATE('01/01/15 20:00','DD/MM/YY HH24:MI'),'street6')
insert into schedules(code, datetime, street)
values ('005',to_timestamp('01/01/15 20:00','DD/MM/YY HH24:MI'),'street6');
insert into schedules(code, datetime, street)
values ('005',timestamp '2015-01-01 20:00:00','street6');
select *
from schedules
where datetime::time < time '18:30'
Postgresql: add 24 hours on a timestamp

Postgresql: add 24 hours on a timestamp


By : Dakshesh Panchal
Date : March 29 2020, 07:55 AM
it helps some times +00 meant it is timestamp with timezone and your client timezone is UTC.
If you dont want those +00 on the screen, cast it to timestamp without timezone, eg:
code :
t=# select now();
              now
-------------------------------
 2017-05-23 09:04:46.105322+00
(1 row)

Time: 0.690 ms
t=# select now()::timestamp;
            now
----------------------------
 2017-05-23 09:04:51.849522
(1 row)

Time: 0.537 ms
select (to_timestamp(timestamp_start, 'YYYY-MM-DD HH24:MI:SS.US') + interval '24 hour')::timestamp as tstamp 
from tablename
Fetch all events for the next 24 hours, including current events in the Office365 API

Fetch all events for the next 24 hours, including current events in the Office365 API


By : user1567250
Date : March 29 2020, 07:55 AM
I hope this helps . I found out how to do is with some help from Microsoft. I now use https://graph.microsoft.com/v1.0/users/me/calendars//events with a $filter property containing the following:
code :
Start/DateTime le '<current date/time>' and End/DateTime gt '<current date/time>' or Start/DateTime gt '<current date/time>'
More than 24 hours in a day in postgreSQL

More than 24 hours in a day in postgreSQL


By : Gokul Limbe
Date : March 29 2020, 07:55 AM
seems to work fine Assuming I have this schema: , You have to adjust interval with justify_interval() function:
code :
select customer_id, justify_interval(avg(return_date - rental_date)) as "avg"
from rental
group by customer_id
order by "avg" DESC;
AWS RDS for PostgreSQL cannot be connected after several hours

AWS RDS for PostgreSQL cannot be connected after several hours


By : Max Lippe
Date : March 29 2020, 07:55 AM
Any of those help Finally, I found the answer for my problem. For the error of "connection timeout", one of the reasons can be from the privacy settings. Although I set it as public when creating the RDS instance, the instance is attached with a VPC security group which is not public. We can attach the RDS instance with a public VPC (I don't think it is a good setting, just for the beginner in AWS like me) as below: - from Services, select EC2, select Security Groups in the left panel. - click "Create Security Group" button. - in the dialog, enter the name for the Group, e.g "postgres-public-access" - in the dialog, click "Add Rule" button. - In the "Type" column, select "PostgreSQL" or other types of RDS instances. - In the "Source" column, enter "0.0.0.0/0". - Click "Save" button. - from Services, select RDS, select the RDS instance, click "Modify" button. - In "Network & Security", "Security group", select the VPC Security Group you just created, in my case, it is "postgres-public-access". - Click "Continue" button. Now you can go ahead and connect with your database everywhere.
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