SQL DATETIME2FROMPARTS Function

SQL DATETIME2FROMPARTS function is one of the Date and Time Function used to return a datetime2 value from the user’s specified date and time parts.

This function returns datetime2 data type value as output. The basic syntax of the DATETIME2FROMPARTS Function in SQL Server is as follows:

DATETIME2FROMPARTS (year, month, day, hour, minute, seconds, fractions, precision)

As you can see from the above syntax, this function accepts eight arguments to built date and time. Here, the Fraction value will always depend upon the Precision. If the precision value is 5, then the value of the fraction must also be 5 (or less than 5); otherwise, it throws an error.

SQL DATETIME2FROMPARTS Function Example

In this example, we will show you the use of the DateTime2FromParts function

-- Example for SQL DATETIME2FROMPARTS Function
SELECT DATETIME2FROMPARTS ( 2017, 12, 18, 15, 45, 09, 5, 1 ) AS Result

SELECT DATETIME2FROMPARTS ( 2017, 12, 18, 15, 45, 09, 50, 2 ) AS Result

SELECT DATETIME2FROMPARTS ( 2017, 12, 18, 15, 45, 09, 503, 3 ) AS Result

-- Let me try the NULL values
SELECT DATETIME2FROMPARTS ( 2017, 12, NULL, 15, 45, 09, 503, 3 ) AS Result

-- Precision Value is greater than Fraction
SELECT DATETIME2FROMPARTS ( 2017, 12, 18, 15, 45, 09, 503, 7 ) AS Result

-- Precision Value is Les than Fraction. Invalid argument
SELECT DATETIME2FROMPARTS ( 2017, 12, 18, 15, 45, 09, 503, 2 ) AS Result

As you can see, the last statement is throwing an error. This is because, Fraction value = 503, and Precision = 2 (does not match).

Let me show you the result