default length unit: characters

BigQueryDb2 (LUW)DerbyH2MariaDBMySQLOracle DBPostgreSQLSQL ServerSQLite200720092011201320152017201920212023⊘ 2008R2 - 2022✓ 8.3 - 18⚠ 11gR1 - 23.9a✓ 8.0.11 - 9.4.0⊘ 5.0 - 5.7✓ 5.1 - 12.0.2⊘ 1.4.192 - 2.4.240⊘ 10.15.1.3 - 10.17.1.0⚠ 11.1 - 12.1.2b⚠ 10.5⊘ 9.7✓ 2.0
  1. 16 bit units for national types, depends on nls_length_semantics for the other types
  2. Characters for national types, depends on nls_string_units for the other types