Vertica Quick Tip: What’s the last day of the month?
The Vertica built-in LAST_DAY function returns the last day of the month for a specified date. This function comes in handy for leap years.
Example:
dbadmin=> SELECT last_day('02/28/2018') NOT_A_LEAP_YEAR, last_day('02/28/2020') A_LEAP_YEAR;
NOT_A_LEAP_YEAR | A_LEAP_YEAR
-----------------+-------------
2018-02-28 | 2020-02-29
(1 row)
In one of my previous positions, an accountant asked how to compute the last day of the previous month. That’s not a problem when you combine a few Vertica built-in functions.Example:
dbadmin=> SELECT LAST_DAY(ADD_MONTHS('03/28/2020', -1)) STILL_A_LEAP_YEAR;
STILL_A_LEAP_YEAR
-------------------
2020-02-29
(1 row)
Have Fun!