How to: |
Given a date or timestamp and a component, DTRUNC returns the first date within the period specified by that component.
DTRUNC(date_or_timestamp, date_period)
where:
Date or date-time
Is the date or timestamp of interest.
Is the period whose starting or ending date you want to find. Can be one of the following:
By default, the first day of the week will be Sunday, but this can be changed using the WEEKFIRST parameter.
DTRUNC returns the first date of the quarter given the date of birth:
DTRUNC(DATE_OF_BIRTH,QUARTER)
For 1993/03/27, the result is 1993/03/01.
DTRUNC returns the date that represents the start of the week.
DTRUNC(START_DATE, WEEK)
For 2013/01/15, the result is 2013/01/13
DTRUNC calculates the date of the end of the week.
WEEKEND/YYMD = DTRUNC(START_DATE, WEEK_END)
For 2013/01/15, the result is 2013/01/19.
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