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.

Este exercício faz parte do curso

Time Series Analysis in SQL Server

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Instruções do exercício

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

Exercício interativo prático

Experimente este exercício completando este código de exemplo.

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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