MONTHS BETWEEN UDF [DEPRECATED]
This UDF has been deprecated. Current transformation for Oracle MONTHS_BETWEEN() is Snowflake MONTHS_BETWEEN().
Description
MONTHS_BETWEEN
returns number of months between datesdate1
anddate2
. (Oracle MONTHS_BETWEEN SQL Language Reference)
MONTHS_BETWEEN(date1, date2)
Oracle MONTHS_BETWEEN
and Snowflake MONTHS_BETWEEN
function, have some functional differences, to minimize these differences and replicate Oracle MONTHS_BETWEEN
function better, we added a custom UDF.
Custom UDF overloads
MONTHS_BETWEEN_UDF(timestamp_ltz, timestamp_ltz)
Parameters
FIRST_DATE: The first
TIMESTAMP_LTZ
of the operation.SECOND_DATE: The second
TIMESTAMP_LTZ
of the operation.
CREATE OR REPLACE FUNCTION PUBLIC.MONTHS_BETWEEN_UDF(FIRST_DATE TIMESTAMP_LTZ, SECOND_DATE TIMESTAMP_LTZ)
RETURNS NUMBER(20,6) IMMUTABLE
AS
$$
CASE WHEN DAY(SECOND_DATE) <= DAY(FIRST_DATE)
THEN TIMESTAMPDIFF(MONTH,SECOND_DATE,FIRST_DATE)
ELSE TIMESTAMPDIFF(MONTH,SECOND_DATE,FIRST_DATE) - 1
END +
(CASE
WHEN DAY(SECOND_DATE) = DAY(FIRST_DATE) THEN 0
WHEN DAY(SECOND_DATE) < DAY(FIRST_DATE) AND TO_TIME(SECOND_DATE) > TO_TIME(FIRST_DATE) THEN DAY(FIRST_DATE) - DAY(SECOND_DATE) - 1
WHEN DAY(SECOND_DATE) <= DAY(FIRST_DATE) THEN DAY(FIRST_DATE) - DAY(SECOND_DATE)
ELSE 31 - DAY(SECOND_DATE) + DAY(FIRST_DATE)
END / 31) +
(CASE
WHEN DAY(SECOND_DATE) = DAY(FIRST_DATE) THEN 0
WHEN HOUR(SECOND_DATE) <= HOUR(FIRST_DATE) THEN HOUR(FIRST_DATE) - HOUR(SECOND_DATE)
ELSE 24 - HOUR(SECOND_DATE) + HOUR(FIRST_DATE)
END / (24*31)) +
(CASE
WHEN DAY(SECOND_DATE) = DAY(FIRST_DATE) THEN 0
WHEN MINUTE(SECOND_DATE) <= MINUTE(FIRST_DATE) THEN MINUTE(FIRST_DATE) - MINUTE(SECOND_DATE)
ELSE 24 - HOUR(SECOND_DATE) + MINUTE(FIRST_DATE)
END / (24*60*31)) +
(CASE
WHEN DAY(SECOND_DATE) = DAY(FIRST_DATE) THEN 0
WHEN MINUTE(SECOND_DATE) <= MINUTE(FIRST_DATE) THEN MINUTE(FIRST_DATE) - MINUTE(SECOND_DATE)
ELSE 24 - HOUR(SECOND_DATE) + MINUTE(FIRST_DATE)
END / (24*60*60*31))
$$
;
Oracle
SELECT
MONTHS_BETWEEN('2000-03-20 22:01:11', '1996-03-20 10:01:11'),
MONTHS_BETWEEN('1996-03-20 22:01:11', '2000-03-20 10:01:11'),
MONTHS_BETWEEN('1982-05-11 22:31:19', '1900-01-25 15:21:15'),
MONTHS_BETWEEN('1999-12-25 01:15:16', '1900-12-11 02:05:16')
FROM DUAL;
Snowflake
SELECT
/*** MSC-WARNING - MSCEWI1020 - CUSTOM UDF 'MONTHS_BETWEEN_UDF' INSERTED. ***/
MONTHS_BETWEEN_UDF('2000-03-20 22:01:11', '1996-03-20 10:01:11'),
/*** MSC-WARNING - MSCEWI1020 - CUSTOM UDF 'MONTHS_BETWEEN_UDF' INSERTED. ***/
MONTHS_BETWEEN_UDF('1996-03-20 22:01:11', '2000-03-20 10:01:11'),
/*** MSC-WARNING - MSCEWI1020 - CUSTOM UDF 'MONTHS_BETWEEN_UDF' INSERTED. ***/
MONTHS_BETWEEN_UDF('1982-05-11 22:31:19', '1900-01-25 15:21:15'),
/*** MSC-WARNING - MSCEWI1020 - CUSTOM UDF 'MONTHS_BETWEEN_UDF' INSERTED. ***/
MONTHS_BETWEEN_UDF('1999-12-25 01:15:16', '1900-12-11 02:05:16')
FROM DUAL;
Known Issues
1. Precision may differ from Oracle
Some results may differ in the number of decimal digits.
Related EWIs
MSCEWI1020: CUSTOM UDF INSERTED.
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