I am trying to save a time string in the database in the form of HH:MM AM/PM format. e.g. 12:00 AM to 11:00 PM. These strings are already defined in the code. What is the best data type to store these strings in database using SQL Server 2012.
What is the better way? a generic list in the code to populate values when page loads and then store or store all values in the database from 12:00 AM to 11:00 PM and then get from database.
If you use DateTime or DateTime2 in the database it's a 24 hour clock, there is no AM/PM format. You get an AM/PM format by doing this in the code:
dateTime.ToString("tt", CultureInfo.InvariantCulture);
Related
I'm trying to compare date that comes from ActionMailbox mail.date with a date field in my PostgreSQL DB Table to check if a post for the same date already exists. The dates comes in different format I guess, how canI format them in same way to compare? The time section is irrelevant.
Date format that comes from email as below I guess. Looking at the Logs on server
Date: Wed, 24 Mar 2021 09:57:57 +0000
Date format I have in the DB is as below. Output of Post.last in rails c
date: "2021-03-24 09:57:57.000000000 +0000
I need to check if dates matches or not?
Btw the interesting thing is, I can just save mail.date to db without any particular formatting, I guess it is formatting itself before saving.
Date format I have in the DB is as below.
Databases don't store timestamps nor dates as strings, they're stored as numbers. The string format is just for humans. Unless you're storing the date as a string.
I'm trying to compare date that comes from ActionMailbox mail.date with a date field in my PostgreSQL DB Table to check if a post for the same date already exists.
Those are standard date formats, RFC 2822 and ISO 8601. So long as your date column has a date type you don't need to convert them. Rails or Postgres will take care of the conversion.
Thing.where(date: mail.date)
However, your "date" field is storing a timestamp. It might be misnamed, or it might be mistyped. If you only want to store the date, use t.date in your migration.
If you did, you'd parse them into Time objects, then compare.
t1 = Time.zone.parse("Wed, 24 Mar 2021 09:57:57 +0000")
t2 = Time.zone.parse("2021-03-24 09:57:57.000000000 +0000")
p t1 == t2
Btw the interesting thing is, I can just save mail.date to db without any particular formatting, I guess it is formatting itself before saving.
Rails type conversion is parsing the String into an ActiveSupport::TimeWithZone object.
> thing = Thing.new
> thing.created_at = "Wed, 24 Mar 2021 09:57:57 +0000"
> thing.created_at
=> Wed, 24 Mar 2021 04:57:57.000000000 CDT -05:00
> thing.created_at.class
=> ActiveSupport::TimeWithZone
I have a use-case in which I need a user to enter an availability date on the browser (which will be saved in the database in UTC format) for example
July 2nd at 6:30PM,
i am getting IANA location string using momentjs
moment.tz.guess(); //'America/New_York'
now when I do the server side rendering, I would like to render the availability date as
July 2nd at 6:30 EST
or
July 2nd at 6:30 PMT
Is there a javascript library to do this for me? how can I convert 'America/New_York' to EST?
worth mentioning it is a reactjs application
we can achieve this by momentjs. get the IANA timezone with guess() function as explained above to set the timezone and then format it with as documented in moment documents
const date = user input date saved in the database
const z = value of moment.tz.guess() which saved in db
moment(date).tz(z).format('MM/DD/YYYY hh:mm A z');
I am getting some results from a weather API and one of that is date in epoch time stamp.
I found that converting with Date(timeIntervalSince1970:) I get the right date
I am using the specific number --> 1501452000 and I get 2 results on Playground
1) Jul 31,2017,12:00AM. -- when --> let date = Date(timeIntervalSince1970: 1501452000)
2) 2017-07-30 22:00:00 +0000 when --> print(date)
API results are :
"time_epoch": 1501452000,
"time": "2017-07-30 23:00",
By checking the rest of my results they are matching with the rest of the API results....... but when I convert 1501452000 -> to date I don't get the correct Hour 23:00 but 22:00 !
Any idea what is happening ?
is it wrong the API( I don't think so ) or the way I am converting it?
Thanks a lot
The timeIntervalSince1970 initializer sets up the time in the UTC timezone, while your API might be sending dates in GMT. When you are using print(data), you have different results, because if you are not using a DateFormatter to generate the String format of the Date object, it uses your devices current settings when formatting the Date object.
A Date object represents an absolute point in time, but when you are printing it with a DateFormatter, it gets converted into a location/time zone specific, relative representation. You just have to set up your DateFormatter to match the time zone settings of your API and you will see the dates correctly printed.
This issue happens on daylight saving times. Is your country changing daylight saving on this exact date?
let date = Date(timeIntervalSince1970: 1501452000) in Playgrounds should give you the time in your system's timezone when you see it on the right hand side.
When you print it and see 2017-07-30 22:00:00 +0000- this is the same timestamp in GMT
Is the API showing a particular time zone? It looks like GMT+1
I have this date in actuall
2016-09-03 19:00:00 +0000
Now I am trying to convert it to String using a specific format like below
But what I am getting in return is not as desired. the formatter is adding on day to the given date like below
Is this standard behaviour ?
This is not standard behaviour. This happen because of the time zone difference. Set time zone proper
Set the timezone.
formatter.timeZone = [NSTimeZone timeZoneWithAbbreviation: #"GMT"];
When you hover over the date, you can see that it is showing UTC, whereas the formatter is automatically converting this to a local date. If your timezone is 5 hours ahead of UTC, then it will be the next day locally from that time.
I am using the below query with date filtering, but I am getting wrong result.
SELECT * FROM TRANSACTIONSHISTORY
WHERE DATE > "29-01-2015 12:00:00"
AND DATE < "30-01-2015 00:00:00" AND USERID=abc
I am getting result with date column with value of 29-Jan-2016 records, what am I missing here, can any one help me to get out of this value.
The date format in your SQL will not work because SQLite doesn't have a native datetime type, so it's generally stored either as a string, in YYYY-MM-DD HH:MM:SS.SSS format, or as an numeric value representing the number of seconds since 1970-01-01 00:00:00 UTC. See date and time types on SQLite.org. Note that if you're using the string representation that the sequence is year, month, day (which, when sorting/querying this string field, the this alphanumeric string will sort correctly by year first, then month, and then day, which is critical when doing queries like yours).
If you really stored dates in the database as a string in the DD-MM-YYYY HH:MM:SS format, you should consider changing the format in which you saved the values into one of the approved date formats. It will make the date interactions with the database much, much easier, allowing queries like the one you asked for (though, obviously, with DD-MM-YYYY replaced with YYYY-MM-DD format).
You have cast your string to Date
SELECT * FROM TRANSACTIONSHISTORY WHERE DATE between Datetime('29-01-2015 12:00:00') and Datetime('30-01-2015 00:00:00') AND USERID=abc
The first answer is exactly what you need. What you did in your code would be comparing strings using ASCII values.
I would recommend you to use the linux time stamps like: 1453818208, which is easier to save and compare. In addition, it can always be translated to human-readable dates like: 29-01-2015 12:00:00.
SELECT * FROM TRANSACTIONSHISTORY
WHERE DATE > "29-01-2015 12:00:00"
AND DATE < "30-01-2015 00:00:00" AND USERID=abc
I hope this helps you :)
Try this first try without Time,after that try date and time both , Hope i will work for you
SELECT TRANSACTIONSHISTORY
FROM SHIPMENT
WHERE DATE
BETWEEN '11-15-2010'
AND '30-01-2015'
// you can try this one also
SELECT * FROM TRANSACTIONSHISTORY WHERE DATE BETWEEN "2011-01-11" AND "2011-8-11"