https://docs.oracle.com/cd/F19136_01/sqlrf/img_text/subpartition_spec.html
Description of the illustration subpartition_spec.eps
description of theillustrationspeceps
https://www.enterprisedb.com/docs/epas/14/epas_compat_table_partitioning/04_partitioning_commands_compatible_with_oracle_databases/05_alter_table_split_subpartition/
EDB Docs - EDB Postgres Advanced Server v14 - ALTER TABLE...SPLIT SUBPARTITION
EDB Postgres Advanced Server Version 14 documentation and release notes. Oracle database compatibility with higher security and data redaction for enterprises.
alter tableedbdocspostgresadvanced