F571: Boolean test
BigQuery
Db2 (LUW)
MariaDB
MySQL
Oracle DB
PostgreSQL
SQL Server
SQLite
2005
2007
2009
2011
2013
2015
2017
2019
2021
⚠ 3.5.7 - 3.42.0
a
⊘ 2008R2 - 2022
✓ 8.3+
⊘ 11gR1 - 21c
✓ 5.0+
✓ 5.1+
⚠ 11.5.0 - 11.5.8
a
⊘ 9.7 - 11.1
✓ 2.0+
a
⚠ 2.0
a
No
is unknown
.
Is null
can be used for this purpose