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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, MariaDB, MySQL
weekday(TIMESTAMP '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)
MemSQL
weekday({ts '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, ClickHouse, Derby, DuckDB, Exasol, Firebird, Informix, Redshift, Snowflake, Teradata, Trino, Vertica, YugabyteDB
/* UNSUPPORTED */
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