I have an error in my original data taken from a weather station recording every five minutes where by the timestamps at midnight only consist of the date but not the time i.e following an entry of 06/03/2018 23:55:00 I have 06/03/2018 but with no attached 00:00:00. The sequence runs over multiples years so and for every midnight entry there is just a date with no time. How can I select these entries out and run an update query to amend the time 00:00:00 to them?
Many thanks,
Matt
sample data:
Apply the format to the Time field:
dd/mm/yyyy hh:nn:ss
where you wish to display the values.
Related
I am creating an attendance system and i want to automatically change the subject based on the time of the day. I have a table consist of subject name, start time, end time and its day. I have a question, is it possible to automatically get the value of a row based on specific time and day?
For example the current time is 12:45 PM and the day is Tuesday. This is my sample table. Then the output will be Principles of OS.
in mysql to get the name the current day use
DAYNAME(date)
and compare it to your sub_day column in selection
I have a transformation which is having table 1-table input 1-row filter 1- table output. When I am inserting all Saturdays from table input to table output, those Saturdays becoming Fridays( I mean time is decreased by few hours which is making date as friday). can someone tell me the issue.
I thought it is because of daylight saving and AWS Ec2 tuned to that date. if it so, the date should be only differ by only an hour. but it is more than that.
This is related to an earlier question that I had here: Convert datetime to a fixed date of the month including the time - mysql
I am raising a another question because this is regarding the timezone component in the datetime.
I have a list of date time values that are stored in GMT. For the purpose of a report, I want to convert the dates to a single date of a month. (which was the subject of the previous thread I mentioned above). What I also would like to do is the take the time zone into consideration. I will explain.
The date field is always stored in GMT. But the report is generated for the HQ that is in EST. So when there the dates are converted to a single date time (again, part of the previous thread) only the dates that fall into that month in EST (not GMT) should be changed to that month.
For example, let us say I have this date stored in the table:
2016-04-01 00:03:07 (GMT). But for a person sitting in Eastern time zone this is created in the month of March. So, when I do the conversion of the dates to a specific date of a month, this date should be converted to 2016-03-15 00:00:00 and not 2016-04-15 00:00:00
Pretty challenging to me!
I need this in this format as I am integrating with a third party application
CONVERT_TZ should be able to convert to your required timezone. Then, do the rest of the operations on the result instead of doing them on th original date.
I'm building an 'events' table that will show the events for that particular day.
However, since most events start late in the evening and end early in the morning I would like to know as to how I should plot and retrieve the data. Let's say that and event day starts at 6:01 AM and ends at 6:00 AM. Is the time dependent on the server time? Can I change it to some other GMT time? How would the time table look in the mysql database?
Thank you!
I would have a table like this:
Event
======
EventID
Name
StartTime
EndTime
StartTime and EndTime would be stored as UTC dates. With this schema you can query however you like, and present the time for whatever time zone you like, but it keeps things consistent and well performing. You would want to index EventID, StartTime, and EndTime.
I want to grab records from a table based on the day of the month the record was created.
This information is stored in a Unix timestamp. During testing I created new test records and threw in some timestamps for specific times that I had converted to timestamps using an online converter. I used...
01/29/2010-02:00:00
Right now I'm using...
FROM_UNIXTIME(timestamp, '%d') == 29
This should work for all times on the 29th day of every month. But it is calculating the timestamp to be 5 hours behind the actual value of the timestamp. When I just run a FROM_UNIXTIME on the timestamp it returns 01/28/2010-21:00:00. I was hoping someone could give an explanation for this, if there is an easy fix or should I just code the program to expect the timezone to be a factor.
The FROM_UNIXTIME function automatically converts the datetime to the current timezone.