isoweek
BigQuery
Db2 (LUW)
MariaDB
MySQL
Oracle DB
PostgreSQL
SQL Server
SQLite
2005
2007
2009
2011
2013
2015
2017
2019
2021
3.5.7 - 3.41.0
2017 - 2022
2008R2
8.3 - 15
11gR1 - 21c
5.0 - 8.0.32
5.1 - 10.11
9.7 - 11.5.8
2.0
b
2.0
a
ISO 8601 week date (year’s first Thursday)
Use
extract(isoyear)
for the corresponding year