LAST_DAY

Syntax

Description of the illustration last_day.gif

Purpose

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

Examples

The following statement determines how many days are left in the current month.

SELECT SYSDATE,
   LAST_DAY(SYSDATE) "Last",
   LAST_DAY(SYSDATE) - SYSDATE "Days Left"
   FROM DUAL;
 
SYSDATE   Last       Days Left
--------- --------- ----------
30-MAY-01 31-MAY-01          1

The following example adds 5 months to the hire date of each employee to give an evaluation date:

SELECT last_name, hire_date, TO_CHAR(
   ADD_MONTHS(LAST_DAY(hire_date), 5)) "Eval Date"
   FROM employees;

LAST_NAME                 HIRE_DATE Eval Date
------------------------- --------- ---------
King                      17-JUN-87 30-NOV-87
Kochhar                   21-SEP-89 28-FEB-90
De Haan                   13-JAN-93 30-JUN-93
Hunold                    03-JAN-90 30-JUN-90
Ernst                     21-MAY-91 31-OCT-91
Austin                    25-JUN-97 30-NOV-97
Pataballa                 05-FEB-98 31-JUL-98
Lorentz                   07-FEB-99 31-JUL-99
. . .