Time part of a DateTime Field in SQL

Question

How would I be able to extract the time part of a DateTime field in SQL? For my project I have to return data that has a timestamp of 5pm of a DateTime field no matter what

Answer 1

SELECT DISTINCT   
                 CONVERT(VARCHAR(17), A.SOURCE_DEPARTURE_TIME, 108)  
FROM  
      CONSOLIDATED_LIST AS A  
WHERE   
      CONVERT(VARCHAR(17), A.SOURCE_DEPARTURE_TIME, 108) BETWEEN '15:00:00' AND '15:45:00'

Answer 2

Try this in SQL Server 2008:

select *
from some_table t
where convert(time,t.some_datetime_column) = '5pm'

If you want take a random datetime value and adjust it so the time component is 5pm, then in SQL Server 2008 there are a number of ways. First you need start-of-day (e.g., 2011-09-30 00:00:00.000).

• One technique that works for all versions of Microsoft SQL Server as well as all versions of Sybase is to use convert/3 to convert the datetime value to a varchar that lacks a time component and then back into a datetime value:

  select convert(datetime,convert(varchar,current_timestamp,112),112)
  

The above gives you start-of-day for the current day.

• In SQL Server 2008, though, you can say something like this:

  select start_of_day =               t.some_datetime_column
                      - convert(time, t.some_datetime_column ) ,
  from some_table t
  

  which is likely faster.

Once you have start-of-day, getting to 5pm is easy. Just add 17 hours to your start-of-day value:

select five_pm = dateadd(hour,17, t.some_datetime_column
                   - convert(time,t.some_datetime_column)
                   )
from some_table t

Answer 3

This should strip away the date part:

select convert(datetime,convert(float, getdate()) - convert(int,getdate())), getdate()

and return a datetime with a default date of 1900-01-01.

Answer 4

Note that from MS SQL 2012 onwards you can use FORMAT(value,'format')

e.g. WHERE FORMAT(YourDatetime,'HH:mm') = '17:00'

Answer 5

I know this is an old question, but since the other answers all

• return strings (rather than datetimes),
• rely on the internal representation of dates (conversion to float, int, and back) or
• require SQL Server 2008 or beyond,

I thought I'd add a "pure" option which only requires datetime operations and works with SQL Server 2005+:

SELECT DATEADD(dd, -DATEDIFF(dd, 0, mydatetime), mydatetime)

This calculates the difference (in whole days) between date zero (1900-01-01) and the given date and then subtracts that number of days from the given date, thereby setting its date component to zero.

Answer 6

you can use CONVERT(TIME,GETDATE()) in this case:

INSERT INTO infoTbl
(itDate, itTime)
VALUES (GETDATE(),CONVERT(TIME,GETDATE()))

or if you want print it or return that time use like this:

DECLARE @dt TIME
SET @dt = CONVERT(TIME,GETDATE())
PRINT @dt