true
,
false
outside of
is
BigQuery
Db2 (LUW)
MariaDB
MySQL
Oracle DB
PostgreSQL
SQL Server
SQLite
2005
2007
2009
2011
2013
2015
2017
2019
2021
✓ 3.23.1+
a
⊘ 3.5.7 - 3.22.0
⊘ 2008R2 - 2022
✓ 8.3+
a
⊘ 11gR1 - 21c
✓ 5.0+
a
✓ 5.1+
a
✓ 11.5.0+
a
⊘ 9.7 - 11.1
✓ 2.0+
a
Only
true
and
false
, not
unknown
. Use
null
instead