ISO_DAY_OF_WEEK
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
Extract the ISO_DAY_OF_WEEK value from a datetime value.
The ISO_DAY_OF_WEEK function is a short version of the EXTRACT, passing a DatePart.ISO_DAY_OF_WEEK value as an argument.
SELECT iso_day_of_week(DATE '2020-02-03');
create.select(isoDayOfWeek(Date.valueOf("2020-02-03"))).fetch();
The result being (Monday = 1, ..., Sunday = 7)
+-----------------+ | iso_day_of_week | +-----------------+ | 7 | +-----------------+
Dialect support
This example using jOOQ:
isoDayOfWeek(Date.valueOf("2020-02-03"))
Translates to the following dialect specific expressions:
-- ASE
(((DATEPART(dw, '2020-02-03 00:00:00.0') + @@datefirst + 5) % 7) + 1)
-- AURORA_MYSQL, MEMSQL, MYSQL
weekday({ts '2020-02-03 00:00:00.0'}) + 1
-- AURORA_POSTGRES, COCKROACHDB, POSTGRES
extract(ISODOW FROM TIMESTAMP '2020-02-03 00:00:00.0')
-- DB2
DAYOFWEEK_ISO(TIMESTAMP '2020-02-03 00:00:00.0')
-- H2
extract(ISO_DAY_OF_WEEK FROM TIMESTAMP '2020-02-03 00:00:00.0')
-- HANA
(weekday(TIMESTAMP '2020-02-03 00:00:00.0') + 1)
-- HSQLDB
(mod(
(EXTRACT(DAY_OF_WEEK FROM TIMESTAMP '2020-02-03 00:00:00.0') + 5),
7
) + 1)
-- MARIADB
weekday(TIMESTAMP '2020-02-03 00:00:00.0') + 1
-- ORACLE
to_number(to_char(TIMESTAMP '2020-02-03 00:00:00.0', 'D'))
-- SQLDATAWAREHOUSE, SQLSERVER
(((DATEPART(dw, CAST('2020-02-03 00:00:00.0' AS DATETIME2)) + @@datefirst + 5) % 7) + 1)
-- SQLITE
(((CAST(strftime('%w', '2020-02-03 00:00:00.0') AS int) + 6) % 7) + 1)
-- SYBASE
(mod(
(DATEPART(dw, '2020-02-03 00:00:00.0') + @@datefirst + 5),
7
) + 1)
-- ACCESS, BIGQUERY, DERBY, DUCKDB, EXASOL, FIREBIRD, INFORMIX, REDSHIFT, SNOWFLAKE, TERADATA, TRINO, VERTICA, YUGABYTEDB
/* UNSUPPORTED */
(These are currently generated with jOOQ 3.19, see #10141), or translate your own on our website
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