MONTHS_BETWEEN
Subtracts to find the number of months between two dates.
Syntax
MONTHS_BETWEEN(date1, date2)
Arguments
date1, date2: a valid date, datetime, or parsable date string. Only the date part is used.
Return Type
Integer. If date1 or date2 is not a valid date, returns NULL.
Examples
SELECT MONTHS_BETWEEN(DATE('2017-03-01'), DATE('2017-01-01'));
****
+--------------------------------------------------------+
| MONTHS_BETWEEN(DATE('2017-03-01'), DATE('2017-01-01')) |
+--------------------------------------------------------+
| 2 |
+--------------------------------------------------------+
1 row in set (0.06 sec)
If date1 is in the past, the function returns a negative result.
SELECT MONTHS_BETWEEN(DATE('2017-01-01'), DATE('2017-03-01'));
****
+--------------------------------------------------------+
| MONTHS_BETWEEN(DATE('2017-01-01'), DATE('2017-03-01')) |
+--------------------------------------------------------+
| -2 |
+--------------------------------------------------------+
1 row in set (0.06 sec)
NOW() can be used as one of the parameters.
SELECT MONTHS_BETWEEN('2017-10-31',NOW());
****
+------------------------------------+
| MONTHS_BETWEEN('2017-10-31',now()) |
+------------------------------------+
| 2.741935483870968 |
+------------------------------------+
1 row in set (0.06 sec)
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