… as (…) virtual
Apache Derby
BigQuery
Db2 (LUW)
H2
MariaDB
MySQL
Oracle DB
PostgreSQL
SQL Server
SQLite
2007
2009
2011
2013
2015
2017
2019
2021
✓ 3.31.0+
⊘ 2008R2 - 2022
⊘ 12 - 15
✓ 11gR1+
✓ 5.7+
✓ 5.2+
⊘ 1.4.191 - 2.1.214
⚠ 9.7 - 11.5.8
a
⊘ 10.15.1.3 - 10.16.1.1
Accepted in a few cases, but suspected to be a parser oddity — use with caution!