Date time conversion and extract only time
If your data is
a <- "17:24:00"
b <- strptime(a, format = "%H:%M:%S")
you can use lubridate
in order to have a result of class integer
library(lubridate)
hour(b)
minute(b)
# > hour(b)
# [1] 17
# > minute(b)
# [1] 24
# > class(minute(b))
# [1] "integer"
and you can combine them using
# character
paste(hour(b),minute(b), sep=":")
# numeric
hour(b) + minute(b)/60
for instance.
I would not advise to do that if you want to do any further operations on your data. However, it might be convenient to do that if you want to plot the results.
How to get Time from DateTime format in SQL?
SQL Server 2008:
SELECT cast(AttDate as time) [time]
FROM yourtable
Earlier versions:
SELECT convert(char(5), AttDate, 108) [time]
FROM yourtable
Converting datetime only to time in pandas
How about that?
>>> df['TimeOnly']=df['Date Created'].dt.strftime('%H:%M:%S')
>>> df
Date Created TimeOnly
0 2016-02-20 09:26:45 09:26:45
1 2016-02-19 19:30:25 19:30:25
2 2016-02-19 18:13:39 18:13:39
3 2016-03-01 14:15:36 14:15:36
4 2016-03-04 14:47:57 14:47:57
Extracting just Month and Year separately from Pandas Datetime column
If you want new columns showing year and month separately you can do this:
df['year'] = pd.DatetimeIndex(df['ArrivalDate']).year
df['month'] = pd.DatetimeIndex(df['ArrivalDate']).month
or...
df['year'] = df['ArrivalDate'].dt.year
df['month'] = df['ArrivalDate'].dt.month
Then you can combine them or work with them just as they are.
How to return only the Date from a SQL Server DateTime datatype
SELECT DATEADD(dd, 0, DATEDIFF(dd, 0, @your_date))
for example
SELECT DATEADD(dd, 0, DATEDIFF(dd, 0, GETDATE()))
gives me
2008-09-22 00:00:00.000
Pros:
- No varchar<->datetime conversions required
- No need to think about locale
How do I convert a datetime to date?
Use the date()
method:
datetime.datetime.now().date()
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