SMALLDATETIMEFROMPARTS is one of the new built-in Date and Time Function introduced as a Part of Sql Server 2012. Returns a SMALLDATETIME value for the specified date and time. It is a Sql Server native function not dependent on the .NET CLR.

SYNTAX: SMALLDATETIMEFROMPARTS ( year, month, day, hour, minute )

WHERE: year, month, day, hour and minute are integer expressions representing valid year, month, day, hour and minute respectively.
Return Type: SMALLDATETIME

Example 1: SMALLDATETIMEFROMPARTS – with valid date and time part integer constants

SELECT 
 SMALLDATETIMEFROMPARTS(2013,6,23,1,20 ) AS 'SMALLDATETIME',
 SMALLDATETIMEFROMPARTS(1900,1,1,0,0) AS 'MIN SMALLDATETIME',
 SMALLDATETIMEFROMPARTS(2079,6,6,23,59) AS 'MAX SMALLDATETIME'

Result:

SMALLDATETIME         MIN SMALLDATETIME         MAX SMALLDATETIME
———————–           ———————–                   ———————–
2013-06-23 01:20:00   1900-01-01 00:00:00             2079-06-06 23:59:00

Example 2: SMALLDATETIMEFROMPARTS – with valid date and time part integer variables

DECLARE @year INT = 2013, @month INT = 6, @day INT = 23,
		@hour INT = 1, @minute INT = 20
SELECT SMALLDATETIMEFROMPARTS( @year, @month, @day, 
		@hour , @minute) AS 'SMALLDATETIME'

Result:

SMALLDATETIME
———————–
2013-06-23 01:20:00

Example 3: SMALLDATETIMEFROMPARTS – with Invalid part

DECLARE @year INT = 2013, @invalidmonth INT = 15, @day INT = 23,
		@hour INT = 1, @minute INT = 20
SELECT SMALLDATETIMEFROMPARTS( @year, @invalidmonth, @day, 
		@hour , @minute) AS 'SMALLDATETIME'

Result:
Msg 289, Level 16, State 4, Line 3
Cannot construct data type smalldatetime, some of the arguments have values which are not valid.

Example 4: SMALLDATETIMEFROMPARTS – with one of the part as NULL

DECLARE @year INT = 2013, @invalidmonth INT = 15, @day INT = 23,
		@hour INT = 1, @minute INT = NULL
SELECT SMALLDATETIMEFROMPARTS( @year, @invalidmonth, @day, 
		@hour , @minute) AS 'SMALLDATETIME'

Result:
SMALLDATETIME
———————–
NULL

You may like to read the below new built-in function’s introduced in Sql Server 2012: