TRUNC - Truncate Datetime

In Oracle, TRUNC(datetime, unit) function allows you to truncate a datetime value to the specified unit (set zero time, set the first day of the month i.e).


  -- Get current datetime with the time set to zero (returns: 2012-07-13 00:00:00)

TRUNC Function Overview

Oracle TRUNC for datetime:

Syntax TRUNC(datetime [, unit])
Default Unit 'DD' truncates to day (sets zero time)

TRUNC function supports the following truncation units (full list...):

Oracle TRUNC Unit Truncation Result
'DD' 'DDD' Day YYYY-MM-DD 00:00:00
'MM' 'MONTH' Month YYYY-MM-01 00:00:00
'YY' 'YEAR' Year YYYY-01-01 00:00:00
'HH' 'HH24' Hour YYYY-MM-DD HH:00:00
'MI' Minute YYYY-MM-DD HH:MI:00

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