isoweek
BigQuery
Db2 (LUW)
DuckDB
H2
MariaDB
MySQL
Oracle DB
PostgreSQL
SQL Server
SQLite
2015
2017
2019
2021
2023
2025
2.0
b
2.0
a
ISO 8601 week date (year’s first Thursday)
Use
extract(isoyear)
for the corresponding year