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.
This is a part of the course
“Time Series Analysis in SQL Server”
Exercise instructions
- Use
DATEADD()andDATEDIFF()in conjunction with date parts to round down our time to the day, hour, and minute.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
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;This exercise is part of the course
Time Series Analysis in SQL Server
Explore ways to work with date and time data in SQL Server for time series analysis
This chapter covers date and time functionality in SQL Server, including building dates from component parts, formatting dates for reporting, and working with calendar tables.
Exercise 1: Building datesExercise 2: Break out a date into year, month, and dayExercise 3: Break a date and time into component partsExercise 4: Date math and leap yearsExercise 5: Rounding datesExercise 6: Formatting dates for reportingExercise 7: Formatting dates with CAST() and CONVERT()Exercise 8: Formatting dates with FORMAT()Exercise 9: Working with calendar tablesExercise 10: The benefits of calendar tablesExercise 11: Try out a calendar tableExercise 12: Joining to a calendar tableWhat is DataCamp?
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