LAST_DAY function

LAST_DAY returns the date of the last day of the month that contains date. The return type is always DATE, regardless of the data type of the date argument.

Syntax

LAST_DAY ( { date | timestamp } )

Arguments

date | timestamp

A date or timestamp column or an expression that implicitly converts to a date or timestamp.

Return type

DATE

Examples

The following example returns the date of the last day in the current month.

select last_day(sysdate);

  last_day
------------
 2014-01-31
(1 row) 

The following example returns the number of tickets sold for each of the last 7 days of the month.

select datediff(day, saletime, last_day(saletime)) as "Days Remaining", sum(qtysold)
from sales
where datediff(day, saletime, last_day(saletime)) < 7
group by 1
order by 1;

 days remaining |  sum
----------------+-------
              0 | 10140
              1 | 11187
              2 | 11515
              3 | 11217
              4 | 11446
              5 | 11708
              6 | 10988
(7 rows)