unique index … include
Db2 (LUW)
MariaDB
MySQL
Oracle DB
PostgreSQL
SQL Server
SQLite
2007
2009
2011
2013
2015
2017
2019
2021
⊘ 3.5.7 - 3.26.0
✓ 2008R2+
✓ 11+
⊘ 8.3 - 10
⊘ 11gR1 - 18c
a
⊘ 5.0 - 8.0.14
⊘ 5.1 - 10.3
✓ 9.7+
Use
unique (…) using index …
with an index that has more columns