…matched then … where …
Apache Derby
BigQuery
Db2 (LUW)
H2
Oracle DB
PostgreSQL
SQL Server
2007
2009
2011
2013
2015
2017
2019
2021
✓ 11gR1+
a
⚠ 1.4.198 - 1.4.200
a
b
⚡Implementation-defined resolution of ambiguous column names
Qualified identifiers not always accepted