wrong ambiguity in
values
⓸
Apache Derby
BigQuery
Db2 (LUW)
H2
Oracle DB
PostgreSQL
SQL Server
2007
2009
2011
2013
2015
2017
2019
2021
⚡ 11gR1 - 21c
a
⚡ 2.0.202 - 2.1.214
a
⚡ 10.15.1.3 - 10.16.1.1
a
Columns names that exist in both tables may cause errors even though only the source should be in scope—
in those systems qualification resolves the problem
, but that is not standard SQL