period for system_time

BigQueryDb2 (LUW)MariaDBMySQLOracle DBPostgreSQLSQL ServerSQLite200520072009201120132015201720192021⊘ 3.5.7 - 3.39.0✓ 2016+⊘ 2008R2 - 2014⊘ 8.3 - 14⊘ 11gR1 - 21cb⊘ 5.0 - 8.0.30✓ 10.3+⊘ 5.1 - 10.2⚠ 10.5 - 11.5.7a⊘ 9.7⊘ 2.0
  1. Without keyword for (period system_time (…))
  2. Oracle’s “Flashback” offers similar functionality with a proprietary syntax