cast(<timestamp> as date)

BigQueryDb2 (LUW)MariaDBMySQLOracle DBPostgreSQLSQL ServerSQLite2005200720092011201320152017201920212023⊘ 3.5.7 - 3.50.0b✓ 2008R2 - 2022✓ 8.3 - 18⊘ 11gR1 - 23.9a✓ 5.0 - 9.4.0✓ 5.1 - 12.0.2✓ 9.7 - 12.1.2✓ 2.0
  1. See “Caution: Oracle Database” above
  2. Use date(<timestamp>) instead