T591, Null in UNIQUE-Constraints
BigQuery
Db2 (LUW)
Derby
H2
MariaDB
MySQL
Oracle DB
PostgreSQL
SQL Server
SQLite
2005
2007
2009
2011
2013
2015
2017
2019
2021
2023
✓ 3.5.7 - 3.50.0
✓ 2008R2 - 2022
✓ 8.3 - 18
✓ 11gR1 - 23.26.0
✓ 5.0 - 9.5.0
✓ 5.1 - 12.0.2
✓ 1.4.192 - 2.4.240
✓ 10.15.1.3 - 10.17.1.0
⊘ 9.7 - 12.1.2
⊘ 2.0