intersect, select w/o from

BigQueryDb2 (LUW)MariaDBMySQLOracle DBPostgreSQLSQL ServerSQLite200520072009201120132015201720192021✓ 3.5.7+✓ 2008R2+✓ 8.3+⊘ 11gR1 - 21c✓ 8.0.31+⊘ 5.0 - 8.0.30✓ 10.3+⊘ 5.1 - 10.2⊘ 9.7 - 11.5.7✓ 2.0+