EXTRACT

Returns part of a date.

Sample usage

EXTRACT(QUARTER FROM Order Date)

1) Returns a date part.

EXTRACT(part FROM date_expression)

2) Returns a Date from a Date & Time field or expression.

EXTRACT(DATE FROM date_expression)

date_expression - a Date or a Date & Time field or expression.

part - the date part to return. EXTRACT supports the following parts:

DAYOFWEEK: Returns values in the range [1, 7] with Sunday as the first day of the week.
DAY
DAYOFYEAR
WEEK: Returns the week number of the date in the range [0, 53]. Weeks begin with Sunday, and dates prior to the first Sunday of the year are in week 0.
ISOWEEK: Returns the ISO 8601 week number of the date_expression - . ISOWEEKs begin on Monday. Returns values in the range [1, 53]. The first ISOWEEK of each ISO year begins on the Monday before the first Thursday of the Gregorian calendar year.
MONTH
QUARTER: Returns values in the range [1, 4].
YEAR
ISOYEAR: Returns the ISO 8601 week-numbering year, which is the Gregorian calendar year containing the Thursday of the week to which date_expression - belongs.

In the following example, EXTRACT returns a value corresponding to the DAY time part.

Example formula	Output
`EXTRACT(DAY FROM DATE '2013-12-25')`	25

In the following example, EXTRACT returns values corresponding to different time parts from a column of dates near the end of the year.

Output:

Input date	Isoyear	Isoweek	Year	Week
2015-12-23	2015	52	2015	51
2015-12-24	2015	52	2015	51
2015-12-25	2015	52	2015	51
2015-12-26	2015	52	2015	51
2015-12-27	2015	52	2015	52
2015-12-28	2015	53	2015	52
2015-12-29	2015	53	2015	52
2015-12-30	2015	53	2015	52
2015-12-31	2015	53	2015	52
2016-01-01	2015	53	2016	0
2016-01-02	2015	53	2016	0
2016-01-03	2015	53	2016	1
2016-01-04	2016	1	2016	1
2016-01-05	2016	1	2016	1
2016-01-06	2016	1	2016	1
2016-01-07	2016	1	2016	1
2016-01-08	2016	1	2016	1
2016-01-09	2016	1	2016	1