Unique
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 - 3.43.0
a
✓ 2008R2 - 2022
✓ 12 - 16
✓ 11gR1 - 21c
✓ 5.7 - 8.0.34
✓ 10.2 - 10.11
⚠ 5.2 - 10.1
✓ 1.4.191 - 2.2.220
✓ 9.7 - 11.5.8
✓ 10.15.1.3 - 10.16.1.1
Only without explicit data type:
col_name
integer
generated always as …