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Break out a date into year, month, and day

SQL Server has a number of functions dedicated to working with date types. We will first analyze three functions which return integers representing the year, month, and day of month, respectively.

These functions can allow us to group dates together, letting us calculate running totals by year or month-over-month comparisons of expenditures. We could also analyze sales by calendar day of the month to determine if there is a strong monthly cycle.

This exercise is part of the course

Time Series Analysis in SQL Server

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Exercise instructions

  • Use the YEAR(), MONTH(), and DAY() functions to determine the year, month, and day for the current date and time.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

DECLARE
	@SomeTime DATETIME2(7) = SYSUTCDATETIME();

-- Retrieve the year, month, and day
SELECT
	___(@SomeTime) AS TheYear,
	___(@SomeTime) AS TheMonth,
	___(@SomeTime) AS TheDay;
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