Replace year in datetime date

Question

I have a table with a column (dateDT), formatted as datetime and a variable input for the year (@selYear) in my Select, formatted as int.

Answer 1

You can use DATEFROMPARTS in sqlserver 2012

DECLARE @selYear int = 2014
DECLARE @dateDT datetime = '2010-05-02'
SELECT DATEFROMPARTS(@selYear, 
                     DATEPART(m, @dateDT), 
                     DATEPART(d, @dateDT))

Answer 2

A solution using DATEADD function:

DECLARE @selYear VARCHAR(4) = 2014
DECLARE @dateDT DATETIME = '2010-05-02 00:00:00.000'


SELECT DATEADD(YEAR,@selYear - YEAR(@dateDT),@dateDT)

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This is example with smaller then current year:

DECLARE @selYear INT = 2009
DECLARE @dateDT DATETIME = '2010-05-02 00:00:00.000'


SELECT DATEADD(YEAR,@selYear - YEAR(@dateDT),@dateDT)

Answer 3

SELECT REPLACE(dateDT, DATEPART(year, dateDT), @selYear)