Rounding dates

SQL Server does not have an intuitive way to round down to the month, hour, or minute. You can, however, combine the DATEADD() and DATEDIFF() functions to perform this rounding.

To round the date 1914-08-16 down to the year, we would call DATEADD(YEAR, DATEDIFF(YEAR, 0, '1914-08-16'), 0).

To round the date down to the month, we would call DATEADD(MONTH, DATEDIFF(MONTH, 0, '1914-08-16'), 0).

This works for several other date parts as well.

Questo esercizio fa parte del corso

Time Series Analysis in SQL Server

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Istruzioni dell'esercizio

Use DATEADD() and DATEDIFF() in conjunction with date parts to round down our time to the day, hour, and minute.

Esercizio pratico interattivo

Prova a risolvere questo esercizio completando il codice di esempio.

DECLARE
	@SomeTime DATETIME2(7) = '2018-06-14 16:29:36.2248991';

-- Fill in the appropriate functions and date parts
SELECT
	DATEADD(___, DATEDIFF(DAY, 0, @SomeTime), 0) AS RoundedToDay,
	___(___, ___(___, 0, @SomeTime), 0) AS RoundedToHour,
	___(___, ___(___, 0, @SomeTime), 0) AS RoundedToMinute;

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