# Extract a part of a date Shape / columns A variant of [Parse a date or time](https://meridian.online/operations/parse-a-date-or-time). Take a component such as the year, month, weekday or hour out of a date or time as its own value. Page: ## Status Runs as a SQL step. arcform carries it as a `sql:` step today. ## The DuckDB step take the year, month, weekday and hour out of a date It reads the `orders` table the proofs share. Create it first: ```sql CREATE TABLE orders AS SELECT * FROM (VALUES (1, 'Alice Ng', 'north', DATE '2026-01-03', 120.00, 'widget', 'a|b', '{"channel":"web","items":[1,2]}'), (2, 'alice ng', 'north', DATE '2026-01-05', 80.50, 'gadget', 'b', '{"channel":"shop","items":[3]}'), (3, 'Bob Okafor', 'south', DATE '2026-01-05', 300.00, 'widget', 'a|c', '{"channel":"web","items":[4,5,6]}'), (4, 'Carla Díaz', 'east', DATE '2026-01-09', NULL, 'gizmo', NULL, '{"channel":"web","items":[]}'), (5, 'Bob Okafor', 'south', DATE '2026-01-12', 45.25, 'gadget', 'c', '{"channel":"phone","items":[7]}'), (6, 'Dev Patel', 'west', DATE '2026-01-12', 510.00, 'widget', 'a', '{"channel":"web","items":[8,9]}'), (7, 'Carla Diaz', 'east', DATE '2026-01-20', 99.99, 'gizmo', 'b|c', '{"channel":"shop","items":[10]}'), (8, 'Dev Patel', 'west', DATE '2026-02-02', 510.00, 'widget', 'a', '{"channel":"web","items":[8,9]}'), (9, 'Eve Larsen', NULL, DATE '2026-02-03', 15.00, 'gadget', NULL, '{"channel":"web","items":[11]}'), (10, 'Alice Ng', 'north', DATE '2026-02-10', 220.00, 'gizmo', 'a|b|c', '{"channel":"phone","items":[12,13]}') ) t(order_id, customer, region, order_date, amount, product, tags, meta); ``` Then run the statement: ```sql CREATE TEMP TABLE result AS SELECT order_id, year(order_date) AS yr, month(order_date) AS mo, dayname(order_date) AS weekday, quarter(order_date) AS qtr, hour(TIMESTAMP '2026-02-10 14:30:00') AS hr FROM orders; SELECT * FROM result; SELECT CASE WHEN ((SELECT [yr, mo, qtr, hr] FROM result WHERE order_id = 10) = [2026, 2, 1, 14] AND (SELECT weekday FROM result WHERE order_id = 10) = 'Tuesday' AND (SELECT weekday FROM result WHERE order_id = 1) = 'Saturday' AND (SELECT count(*) FILTER (WHERE mo = 1) FROM result) = 7) THEN 'as expected' ELSE error('year, month, weekday, quarter and hour were not taken out of the dates correctly') END AS verdict; ``` It needs nothing installed beyond DuckDB itself. ## What other tools call it Meridian's classification; an independent blind rating agreed on 95.7% of 324 rows (variant, version 3). - DuckDB: [`Date Part Functions (family)`](https://duckdb.org/docs/current/sql/functions/datepart) (read 2026-09-27) - Duckle: [`Extract Part`](https://github.com/slothflowlabs/duckle/blob/f85f8960edfb6efbf4cb89d58a7b32e16df0e867/website/docs/components.html) (read 2026-09-25) - EasyMorph: [`Make date/time columns`](https://help.easymorph.com/doku.php?id=transformations:makedatetimecolumns) (read 2026-09-27) - AWS Glue: [`MonthName`](https://docs.aws.amazon.com/glue/latest/dg/aws-glue-api-pyspark-transforms-MonthName.html) (read 2026-09-27) - Ibis: [`Date`](https://github.com/ibis-project/ibis/blob/05d2b293344e86cb41c1a426071734f7e270335a/ibis/expr/operations/temporal.py) (read 2026-09-27) - Ibis: [`DayOfWeekIndex`](https://github.com/ibis-project/ibis/blob/05d2b293344e86cb41c1a426071734f7e270335a/ibis/expr/operations/temporal.py) (read 2026-09-27) - Ibis: [`DayOfWeekName`](https://github.com/ibis-project/ibis/blob/05d2b293344e86cb41c1a426071734f7e270335a/ibis/expr/operations/temporal.py) (read 2026-09-27) - Ibis: [`ExtractDay`](https://github.com/ibis-project/ibis/blob/05d2b293344e86cb41c1a426071734f7e270335a/ibis/expr/operations/temporal.py) (read 2026-09-27) - Ibis: [`ExtractDayOfYear`](https://github.com/ibis-project/ibis/blob/05d2b293344e86cb41c1a426071734f7e270335a/ibis/expr/operations/temporal.py) (read 2026-09-27) - Ibis: [`ExtractHour`](https://github.com/ibis-project/ibis/blob/05d2b293344e86cb41c1a426071734f7e270335a/ibis/expr/operations/temporal.py) (read 2026-09-27) - Ibis: [`ExtractIsoYear`](https://github.com/ibis-project/ibis/blob/05d2b293344e86cb41c1a426071734f7e270335a/ibis/expr/operations/temporal.py) (read 2026-09-27) - Ibis: [`ExtractMicrosecond`](https://github.com/ibis-project/ibis/blob/05d2b293344e86cb41c1a426071734f7e270335a/ibis/expr/operations/temporal.py) (read 2026-09-27) - Ibis: [`ExtractMillisecond`](https://github.com/ibis-project/ibis/blob/05d2b293344e86cb41c1a426071734f7e270335a/ibis/expr/operations/temporal.py) (read 2026-09-27) - Ibis: [`ExtractMinute`](https://github.com/ibis-project/ibis/blob/05d2b293344e86cb41c1a426071734f7e270335a/ibis/expr/operations/temporal.py) (read 2026-09-27) - Ibis: [`ExtractMonth`](https://github.com/ibis-project/ibis/blob/05d2b293344e86cb41c1a426071734f7e270335a/ibis/expr/operations/temporal.py) (read 2026-09-27) - Ibis: [`ExtractQuarter`](https://github.com/ibis-project/ibis/blob/05d2b293344e86cb41c1a426071734f7e270335a/ibis/expr/operations/temporal.py) (read 2026-09-27) - Ibis: [`ExtractSecond`](https://github.com/ibis-project/ibis/blob/05d2b293344e86cb41c1a426071734f7e270335a/ibis/expr/operations/temporal.py) (read 2026-09-27) - Ibis: [`ExtractWeekOfYear`](https://github.com/ibis-project/ibis/blob/05d2b293344e86cb41c1a426071734f7e270335a/ibis/expr/operations/temporal.py) (read 2026-09-27) - Ibis: [`ExtractYear`](https://github.com/ibis-project/ibis/blob/05d2b293344e86cb41c1a426071734f7e270335a/ibis/expr/operations/temporal.py) (read 2026-09-27) - Ibis: [`Time`](https://github.com/ibis-project/ibis/blob/05d2b293344e86cb41c1a426071734f7e270335a/ibis/expr/operations/temporal.py) (read 2026-09-27) - KNIME Analytics Platform: [`Date&Time Part Extractor`](https://api.hub.knime.com/nodes/*Y7HUng9RndjN31qc?details=full) (read 2026-09-27) - Polars: [`SQL functions: Temporal (group)`](https://docs.pola.rs/api/python/stable/reference/sql/functions/temporal.html) (read 2026-09-27) - RapidMiner Studio: [`Date to Numerical`](https://docs.rapidminer.com/latest/studio/operators/blending/attributes/types/date_to_numerical.html) (read 2026-09-27) - Tableau Prep: [`Convert Dates`](https://help.tableau.com/current/prep/en-us/prep_clean.htm) (read 2026-09-27) - Tableau Prep: [`Custom Fiscal Year`](https://help.tableau.com/current/prep/en-us/prep_clean.htm) (read 2026-09-27)