optional for:
(select …)
BigQuery
Db2 (LUW)
Derby
H2
MariaDB
MySQL
Oracle DB
PostgreSQL
SQL Server
SQLite
2007
2009
2011
2013
2015
2017
2019
2021
2023
3.5.7 - 3.50.0
16 - 18
11gR1 - 23.26.0
1.4.191 - 2.4.240
9.7 - 12.1.2
2.0