I need a help. How to convert timestamp to minute in sql query? Really appreciate it. Below are my table.
Here is my timestamp table field. Need to convert it in minute to get time duration
Select DATEPART(mi, changedate) AS minute from Table_01
Hope this will help you
What do you mean with "convert"?
It is always helpful to give an example.
There are lots of functions in Db2 - very helpful new ones in Db2 11.1 - check out (depending on your goal):
date_trunc ('minutes', current timestamp) as minutes
date_part('minutes', current timestamp) as date_part_minutes
minutes_between('01.03.2016', '01.01.1970') as minutes_between
Related
I want to just get the hours from the timestamp on sql.
Time stamp
Please tag your rdbms next time.
For MySQL, you can use HOUR ( )
For SQL-Server, you can use DATEPART ( )
Im new using sql, i tried to convert interval to minutes. Is there a developed function that did this.
Thank you
You can use epoch and divide by 60.
select extract(epoch from <date>) / 60
extract(epoch) gives the number of seconds since 1970-01-01. So, this gives the number of minutes since 1970-01-01, which seems like a reasonable interpretation of your question.
I suppose from tag that you use PostgreSql.
Postgresql has a very good documentation. In this link you can find all the date-time functions.
In your case you can use this function to truncate date to minute part:
date_trunc(text, timestamp)
date_trunc('minute', date_column)
If you need the timestamp, you can cast to timestamp ::timestamp and then convert to minutes
Just as we are able to extract the date from timestamps in Postgresql using date(CURRENT_TIMESTAMP), I was wondering if there's a equivalent function to extract time. (formatted as hh:mm:ss)
I want to be able to compare a time value, stored in a column with the time datatype (see https://www.postgresql.org/docs/current/datatype-datetime.html), to the current time just using an SQL query.
Any suggestions are most welcome!
You can either use current_time or casting a timestamp to time: current_timestamp::time
e.g.
where the_time_column >= current_time - interval '6' hour
For details, see Current Date/Time in the Postgres manual
I have a hive table that contains a column called timestamp. The timestamp is a bigint field generated from java System.currenttimemillis(). I suppose it should be in UTC. Right now I am trying to select records from 1 hour ago. I know in MySQL you can do something like:
SELECT * FROM table WHERE datetimefield >= DATE_SUB(NOW(), INTERVAL 1 HOUR)
In hive, it seems like NOW() is missing. I did some searching and find unix_timestamp(). I should be able to get the current UTC time in milliseconds by doing a unix_timestamp()*1000.
So if i want to get records from 1 hour ago I am thinking about doing something like:
SELECT * FROM hivetable WHERE datetimefield >= (unix_timestamp()*1000-3600000);
Can someone suggest if it's the right way to approach this problem? Also what if I want to select like 1 day ago? Seems inconvenient to convert that to milliseconds. Any help or suggested readings will be highly appreciated. Thanks in advance for your help.
Yes unix_timestamp() gets you the seconds elapsed since Unix epoch. You can subtract 60*60*1000 milliseconds and compare your field to get the desired records.
For Hive 1.2.0 and higher you can use current_timestamp
select *
from hivetable
where
datetimefield >= ((unix_timestamp()*1000) - 3600000);
For 1 day,convert the milliseconds to date format and use date_sub
select *
from hivetable
where
from_unixtime(unix_timestamp(datetimefield,'MM-dd-yyyy HH:mm:ss')) >=
date_sub(from_unixtime(unix_timestamp()),1);
is there an alternative to the to_char() function in impala? I want to set a timestamp field where the date and minutes are fixed and only showing the hours, but can't seem to find an alternative.
This is my existing code in postgres which I need to convert to impala.
select to_char(starttime, '1900-01-01 HH24:00:00')::timestamp
Any help is appreciated!
In Impala, you can use
SELECT hours_add('1900-01-01', hour(now()));
to get the same result
function hour extracts the hour part from a timestamp
function hours_add adds hour to a timestamp