How to add time to DateTime in SQL

Question

I\'m trying to add custom time to datetime in SQL Server 2008 R2.

Following is what I\'ve tried.

SELECT DATEADD(hh, 03, DATEADD(mi,         


        

Answer 1

Or try an alternate method using Time datatype:

DECLARE @MyTime TIME = '03:30:00', @MyDay DATETIME = CAST(GETDATE() AS DATE)

SELECT @MyDay+@MyTime

Answer 2

The following is simple and works on SQL Server 2008 (SP3) and up:

PRINT @@VERSION
PRINT GETDATE()
PRINT GETDATE() + '01:00:00'
PRINT CONVERT(datetime,FLOOR(CONVERT(float,GETDATE()))) + '01:00:00'

With output:

Microsoft SQL Server 2008 (SP3) - 10.0.5500.0 (X64) 
Mar 15 2017  6:17PM
Mar 15 2017  7:17PM
Mar 15 2017  1:00AM

Answer 3

DECLARE @DDate      date        -- To store the current date
DECLARE @DTime      time        -- To store the current time
DECLARE @DateTime   datetime    -- To store the result of the concatenation
;
SET @DDate      =   GETDATE()   -- Getting the current date
SET @DTime      =   GETDATE()   -- Getting the current time



SET @DateTime   =   CONVERT(datetime, CONVERT(varchar(19), LTRIM(@DDate) + ' ' + LTRIM(@DTime) ));
;
/*
    1. LTRIM the date and time do an automatic conversion of both types to string.
    2. The inside CONVERT to varchar(19) is needed, because you cannot do a direct conversion to datetime
    3. Once the inside conversion is done, the second do the final conversion to datetime.
*/  

-- The following select shows the initial variables and the result of the concatenation
SELECT @DDate, @DTime, @DateTime