Foreign key to another table
Apache Derby
BigQuery
Db2 (LUW)
H2
MariaDB
MySQL
Oracle DB
PostgreSQL
SQL Server
SQLite
2005
2007
2009
2011
2013
2015
2017
2019
2021
⚠ 3.31.0 - 3.42.0
e
⊘ 2008R2 - 2022
✓ 12+
✓ 11gR1+
⚡ 5.7 - 8.0.33
a
b
⚠ 10.9.2 - 10.11
a
⚡ 10.2
c
⚡ 10.1
a
⚡ 5.2
✓ 1.4.191+
✓ 9.7+
⚠ 10.15.1.3 - 10.16.1.1
d
Foreign keys in the column definition are
parsed but ignored
Only with storage option
stored
As table constraint, not inside the column definition
Requires explicit data type:
col_name
integer
generated always as …
Only without explicit data type:
col_name
integer
generated always as …