default length unit:     octets

BigQueryDb2 (LUW)DerbyH2MariaDBMySQLOracle DBPostgreSQLSQL ServerSQLite2007200920112013201520172019202120232019 - 2022c11gR1 - 23.9a11.1 - 12.1.2b9.7 - 10.5
  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
  3. When using UTF8