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Oracle® Database SQL Language Reference
11g Release 2 (11.2)

Part Number E17118-03
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MONTHS_BETWEEN

Syntax

Description of months_between.gif follows
Description of the illustration months_between.gif

Purpose

MONTHS_BETWEEN returns number of months between dates date1 and date2. The month and the last day of the month are defined by the parameter NLS_CALENDAR. If date1 is later than date2, then the result is positive. If date1 is earlier than date2, then the result is negative. If date1 and date2 are either the same days of the month or both last days of months, then the result is always an integer. Otherwise Oracle Database calculates the fractional portion of the result based on a 31-day month and considers the difference in time components date1 and date2.

Examples

The following example calculates the months between two dates:

SELECT MONTHS_BETWEEN
       (TO_DATE('02-02-1995','MM-DD-YYYY'),
        TO_DATE('01-01-1995','MM-DD-YYYY') ) "Months"
  FROM DUAL;

    Months
----------
1.03225806